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Unit 6 Homework 3: Dividing Monomials
9th - 12th grade, mathematics.
10 questions
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Simplify the following monomials: k 6 k 6 \frac{k^6}{k^6} k 6 k 6
k 12 k^{12} k 1 2
k 6 k^6 k 6
Simplify the following monomials: m n 3 n 2 \frac{mn^3}{n^2} n 2 m n 3
m n mn m n
1 2 m n \frac{1}{2}mn 2 1 m n
m − 1 n m^{-1}n m − 1 n
Simplify the following monomials: 8 x 5 y 4 4 x 2 y 2 \frac{8x^5y^4}{4x^2y^2} 4 x 2 y 2 8 x 5 y 4
2 x 3 y 2 2x^3y^2 2 x 3 y 2
4 x 3 y 2 4x^3y^2 4 x 3 y 2
12 x 7 y 6 12x^7y^6 1 2 x 7 y 6
Simplify the following monomials: − 20 x 3 y 2 − 5 x 3 y \frac{-20x^3y^2}{-5x^3y} − 5 x 3 y − 2 0 x 3 y 2
4 y 4y 4 y
− 25 x 3 y -25x^3y − 2 5 x 3 y
4 x y 4xy 4 x y
Simplify the following monomials: 21 m 8 n 5 27 m 5 n 4 \frac{21m^8n^5}{27m^5n^4} 2 7 m 5 n 4 2 1 m 8 n 5
7 9 m 3 n \frac{7}{9}m^3n 9 7 m 3 n
− 6 m 3 n -6m^3n − 6 m 3 n
9 7 m 3 n \frac{9}{7}m^3n 7 9 m 3 n
Simplify the following monomials: 7 p 2 q 2 14 p 2 q 2 \frac{7p^2q^2}{14p^2q^2} 1 4 p 2 q 2 7 p 2 q 2
1 2 \frac{1}{2} 2 1
− 7 -7 − 7
2 2 2
Simplify the following monomials: ( 2 a 3 b 4 ) 3 ( 2 a b 2 ) 5 \frac{\left(2a^3b^4\right)^3}{\left(2ab^2\right)^5} ( 2 a b 2 ) 5 ( 2 a 3 b 4 ) 3
1 4 a 4 b 2 \frac{1}{4}a^4b^2 4 1 a 4 b 2
32 a 5 b 10 32a^5b^{10} 3 2 a 5 b 1 0
8 a 9 b 12 8a^9b^{12} 8 a 9 b 1 2
Simplify the following monomials: ( 4 x 7 6 x ) 2 \left(\frac{4x^7}{6x}\right)^2 ( 6 x 4 x 7 ) 2
4 9 x 12 \frac{4}{9}x^{12} 9 4 x 1 2
16 x 14 16x^{14} 1 6 x 1 4
36 x 2 36x^2 3 6 x 2
Simplify the following monomials: ( 5 x 6 y 2 10 x 4 y ) 2 \left(\frac{5x^6y^2}{10x^4y}\right)^2 ( 1 0 x 4 y 5 x 6 y 2 ) 2
1 4 x 4 y 2 \frac{1}{4}x^4y^2 4 1 x 4 y 2
25 x 12 y 4 25x^{12}y^4 2 5 x 1 2 y 4
100 x 8 y 2 100x^8y^2 1 0 0 x 8 y 2
Simplify the following monomials: ( 2 x 3 ) 2 ( 3 y 4 ) 3 12 x 4 y 5 − 4 x 2 y 7 \frac{\left(2x^3\right)^2\left(3y^4\right)^3}{12x^4y^5}-4x^2y^7 1 2 x 4 y 5 ( 2 x 3 ) 2 ( 3 y 4 ) 3 − 4 x 2 y 7
5 x 2 y 7 5x^2y^7 5 x 2 y 7
9 x 2 y 7 9x^2y^7 9 x 2 y 7
− 4 x 2 y 7 -4x^2y^7 − 4 x 2 y 7
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6.5 Divide Monomials
Learning objectives.
By the end of this section, you will be able to:
- Simplify expressions using the Quotient Property for Exponents
- Simplify expressions with zero exponents
- Simplify expressions using the quotient to a Power Property
- Simplify expressions by applying several properties
- Divide monomials
Be Prepared 6.9
Before you get started, take this readiness quiz.
Simplify: 8 24 . 8 24 . If you missed this problem, review Example 1.65 .
Be Prepared 6.10
Simplify: ( 2 m 3 ) 5 . ( 2 m 3 ) 5 . If you missed this problem, review Example 6.23 .
Be Prepared 6.11
Simplify: 12 x 12 y . 12 x 12 y . If you missed this problem, review Example 1.67 .
Simplify Expressions Using the Quotient Property for Exponents
Earlier in this chapter, we developed the properties of exponents for multiplication. We summarize these properties below.
Summary of Exponent Properties for Multiplication
If a and b a and b are real numbers, and m and n m and n are whole numbers, then
Now we will look at the exponent properties for division. A quick memory refresher may help before we get started. You have learned to simplify fractions by dividing out common factors from the numerator and denominator using the Equivalent Fractions Property. This property will also help you work with algebraic fractions—which are also quotients.
Equivalent Fractions Property
If a , b , and c a , b , and c are whole numbers where b ≠ 0 , c ≠ 0 b ≠ 0 , c ≠ 0 ,
As before, we’ll try to discover a property by looking at some examples.
Notice, in each case the bases were the same and we subtracted exponents.
When the larger exponent was in the numerator, we were left with factors in the numerator.
When the larger exponent was in the denominator, we were left with factors in the denominator—notice the numerator of 1.
This leads to the Quotient Property for Exponents .
Quotient Property for Exponents
If a a is a real number, a ≠ 0 a ≠ 0 , and m and n m and n are whole numbers, then
A couple of examples with numbers may help to verify this property.
Example 6.59
Simplify: ⓐ x 9 x 7 x 9 x 7 ⓑ 3 10 3 2 . 3 10 3 2 .
To simplify an expression with a quotient, we need to first compare the exponents in the numerator and denominator.
Try It 6.117
Simplify: ⓐ x 15 x 10 x 15 x 10 ⓑ 6 14 6 5 . 6 14 6 5 .
Try It 6.118
Simplify: ⓐ y 43 y 37 y 43 y 37 ⓑ 10 15 10 7 . 10 15 10 7 .
Example 6.60
Simplify: ⓐ b 8 b 12 b 8 b 12 ⓑ 7 3 7 5 . 7 3 7 5 .
Try It 6.119
Simplify: ⓐ x 18 x 22 x 18 x 22 ⓑ 12 15 12 30 . 12 15 12 30 .
Try It 6.120
Simplify: ⓐ m 7 m 15 m 7 m 15 ⓑ 9 8 9 19 . 9 8 9 19 .
Notice the difference in the two previous examples:
- If we start with more factors in the numerator, we will end up with factors in the numerator.
- If we start with more factors in the denominator, we will end up with factors in the denominator.
The first step in simplifying an expression using the Quotient Property for Exponents is to determine whether the exponent is larger in the numerator or the denominator.
Example 6.61
Simplify: ⓐ a 5 a 9 a 5 a 9 ⓑ x 11 x 7 . x 11 x 7 .
Try It 6.121
Simplify: ⓐ b 19 b 11 b 19 b 11 ⓑ z 5 z 11 . z 5 z 11 .
Try It 6.122
Simplify: ⓐ p 9 p 17 p 9 p 17 ⓑ w 13 w 9 . w 13 w 9 .
Simplify Expressions with an Exponent of Zero
A special case of the Quotient Property is when the exponents of the numerator and denominator are equal, such as an expression like a m a m a m a m . From your earlier work with fractions, you know that:
In words, a number divided by itself is 1. So, x x = 1 x x = 1 , for any x ( x ≠ 0 ) x ( x ≠ 0 ) , since any number divided by itself is 1.
The Quotient Property for Exponents shows us how to simplify a m a n a m a n when m > n m > n and when n < m n < m by subtracting exponents. What if m = n m = n ?
Consider 8 8 8 8 , which we know is 1.
Now we will simplify a m a m a m a m in two ways to lead us to the definition of the zero exponent. In general, for a ≠ 0 a ≠ 0 :
We see a m a m a m a m simplifies to a 0 a 0 and to 1. So a 0 = 1 a 0 = 1 .
Zero Exponent
If a a is a non-zero number, then a 0 = 1 a 0 = 1 .
Any nonzero number raised to the zero power is 1.
In this text, we assume any variable that we raise to the zero power is not zero.
Example 6.62
Simplify: ⓐ 9 0 9 0 ⓑ n 0 . n 0 .
The definition says any non-zero number raised to the zero power is 1.
Try It 6.123
Simplify: ⓐ 15 0 15 0 ⓑ m 0 . m 0 .
Try It 6.124
Simplify: ⓐ k 0 k 0 ⓑ 29 0 . 29 0 .
Now that we have defined the zero exponent, we can expand all the Properties of Exponents to include whole number exponents.
What about raising an expression to the zero power? Let’s look at ( 2 x ) 0 ( 2 x ) 0 . We can use the product to a power rule to rewrite this expression.
This tells us that any nonzero expression raised to the zero power is one.
Example 6.63
Simplify: ⓐ ( 5 b ) 0 ( 5 b ) 0 ⓑ ( −4 a 2 b ) 0 . ( −4 a 2 b ) 0 .
Try It 6.125
Simplify: ⓐ ( 11 z ) 0 ( 11 z ) 0 ⓑ ( −11 p q 3 ) 0 . ( −11 p q 3 ) 0 .
Try It 6.126
Simplify: ⓐ ( −6 d ) 0 ( −6 d ) 0 ⓑ ( −8 m 2 n 3 ) 0 . ( −8 m 2 n 3 ) 0 .
Simplify Expressions Using the Quotient to a Power Property
Now we will look at an example that will lead us to the Quotient to a Power Property.
Notice that the exponent applies to both the numerator and the denominator.
This leads to the Quotient to a Power Property for Exponents .
Quotient to a Power Property for Exponents
If a a and b b are real numbers, b ≠ 0 b ≠ 0 , and m m is a counting number, then
To raise a fraction to a power, raise the numerator and denominator to that power.
An example with numbers may help you understand this property:
Example 6.64
Simplify: ⓐ ( 3 7 ) 2 ( 3 7 ) 2 ⓑ ( b 3 ) 4 ( b 3 ) 4 ⓒ ( k j ) 3 . ( k j ) 3 .
Try It 6.127
Simplify: ⓐ ( 5 8 ) 2 ( 5 8 ) 2 ⓑ ( p 10 ) 4 ( p 10 ) 4 ⓒ ( m n ) 7 . ( m n ) 7 .
Try It 6.128
Simplify: ⓐ ( 1 3 ) 3 ( 1 3 ) 3 ⓑ ( −2 q ) 3 ( −2 q ) 3 ⓒ ( w x ) 4 . ( w x ) 4 .
Simplify Expressions by Applying Several Properties
We’ll now summarize all the properties of exponents so they are all together to refer to as we simplify expressions using several properties. Notice that they are now defined for whole number exponents.
Summary of Exponent Properties
Example 6.65.
Simplify: ( y 4 ) 2 y 6 . ( y 4 ) 2 y 6 .
Try It 6.129
Simplify: ( m 5 ) 4 m 7 . ( m 5 ) 4 m 7 .
Try It 6.130
Simplify: ( k 2 ) 6 k 7 . ( k 2 ) 6 k 7 .
Example 6.66
Simplify: b 12 ( b 2 ) 6 . b 12 ( b 2 ) 6 .
Try It 6.131
Simplify: n 12 ( n 3 ) 4 . n 12 ( n 3 ) 4 .
Try It 6.132
Simplify: x 15 ( x 3 ) 5 . x 15 ( x 3 ) 5 .
Example 6.67
Simplify: ( y 9 y 4 ) 2 . ( y 9 y 4 ) 2 .
Try It 6.133
Simplify: ( r 5 r 3 ) 4 . ( r 5 r 3 ) 4 .
Try It 6.134
Simplify: ( v 6 v 4 ) 3 . ( v 6 v 4 ) 3 .
Example 6.68
Simplify: ( j 2 k 3 ) 4 . ( j 2 k 3 ) 4 .
Here we cannot simplify inside the parentheses first, since the bases are not the same.
Try It 6.135
Simplify: ( a 3 b 2 ) 4 . ( a 3 b 2 ) 4 .
Try It 6.136
Simplify: ( q 7 r 5 ) 3 . ( q 7 r 5 ) 3 .
Example 6.69
Simplify: ( 2 m 2 5 n ) 4 . ( 2 m 2 5 n ) 4 .
Try It 6.137
Simplify: ( 7 x 3 9 y ) 2 . ( 7 x 3 9 y ) 2 .
Try It 6.138
Simplify: ( 3 x 4 7 y ) 2 . ( 3 x 4 7 y ) 2 .
Example 6.70
Simplify: ( x 3 ) 4 ( x 2 ) 5 ( x 6 ) 5 . ( x 3 ) 4 ( x 2 ) 5 ( x 6 ) 5 .
Try It 6.139
Simplify: ( a 2 ) 3 ( a 2 ) 4 ( a 4 ) 5 . ( a 2 ) 3 ( a 2 ) 4 ( a 4 ) 5 .
Try It 6.140
Simplify: ( p 3 ) 4 ( p 5 ) 3 ( p 7 ) 6 . ( p 3 ) 4 ( p 5 ) 3 ( p 7 ) 6 .
Example 6.71
Simplify: ( 10 p 3 ) 2 ( 5 p ) 3 ( 2 p 5 ) 4 . ( 10 p 3 ) 2 ( 5 p ) 3 ( 2 p 5 ) 4 .
Try It 6.141
Simplify: ( 3 r 3 ) 2 ( r 3 ) 7 ( r 3 ) 3 . ( 3 r 3 ) 2 ( r 3 ) 7 ( r 3 ) 3 .
Try It 6.142
Simplify: ( 2 x 4 ) 5 ( 4 x 3 ) 2 ( x 3 ) 5 . ( 2 x 4 ) 5 ( 4 x 3 ) 2 ( x 3 ) 5 .
Divide Monomials
You have now been introduced to all the properties of exponents and used them to simplify expressions. Next, you’ll see how to use these properties to divide monomials. Later, you’ll use them to divide polynomials.
Example 6.72
Find the quotient: 56 x 7 ÷ 8 x 3 . 56 x 7 ÷ 8 x 3 .
Try It 6.143
Find the quotient: 42 y 9 ÷ 6 y 3 . 42 y 9 ÷ 6 y 3 .
Try It 6.144
Find the quotient: 48 z 8 ÷ 8 z 2 . 48 z 8 ÷ 8 z 2 .
Example 6.73
Find the quotient: 45 a 2 b 3 −5 a b 5 . 45 a 2 b 3 −5 a b 5 .
Try It 6.145
Find the quotient: −72 a 7 b 3 8 a 12 b 4 . −72 a 7 b 3 8 a 12 b 4 .
Try It 6.146
Find the quotient: −63 c 8 d 3 7 c 12 d 2 . −63 c 8 d 3 7 c 12 d 2 .
Example 6.74
Find the quotient: 24 a 5 b 3 48 a b 4 . 24 a 5 b 3 48 a b 4 .
Try It 6.147
Find the quotient: 16 a 7 b 6 24 a b 8 . 16 a 7 b 6 24 a b 8 .
Try It 6.148
Find the quotient: 27 p 4 q 7 −45 p 12 q . 27 p 4 q 7 −45 p 12 q .
Once you become familiar with the process and have practiced it step by step several times, you may be able to simplify a fraction in one step.
Example 6.75
Find the quotient: 14 x 7 y 12 21 x 11 y 6 . 14 x 7 y 12 21 x 11 y 6 .
Be very careful to simplify 14 21 14 21 by dividing out a common factor, and to simplify the variables by subtracting their exponents.
Try It 6.149
Find the quotient: 28 x 5 y 14 49 x 9 y 12 . 28 x 5 y 14 49 x 9 y 12 .
Try It 6.150
Find the quotient: 30 m 5 n 11 48 m 10 n 14 . 30 m 5 n 11 48 m 10 n 14 .
In all examples so far, there was no work to do in the numerator or denominator before simplifying the fraction. In the next example, we’ll first find the product of two monomials in the numerator before we simplify the fraction. This follows the order of operations. Remember, a fraction bar is a grouping symbol.
Example 6.76
Find the quotient: ( 6 x 2 y 3 ) ( 5 x 3 y 2 ) ( 3 x 4 y 5 ) . ( 6 x 2 y 3 ) ( 5 x 3 y 2 ) ( 3 x 4 y 5 ) .
Try It 6.151
Find the quotient: ( 6 a 4 b 5 ) ( 4 a 2 b 5 ) 12 a 5 b 8 . ( 6 a 4 b 5 ) ( 4 a 2 b 5 ) 12 a 5 b 8 .
Try It 6.152
Find the quotient: ( −12 x 6 y 9 ) ( −4 x 5 y 8 ) −12 x 10 y 12 . ( −12 x 6 y 9 ) ( −4 x 5 y 8 ) −12 x 10 y 12 .
Access these online resources for additional instruction and practice with dividing monomials:
- Rational Expressions
- Dividing Monomials
- Dividing Monomials 2
Section 6.5 Exercises
Practice makes perfect.
In the following exercises, simplify.
ⓐ x 18 x 3 x 18 x 3 ⓑ 5 12 5 3 5 12 5 3
ⓐ y 20 y 10 y 20 y 10 ⓑ 7 16 7 2 7 16 7 2
ⓐ p 21 p 7 p 21 p 7 ⓑ 4 16 4 4 4 16 4 4
ⓐ u 24 u 3 u 24 u 3 ⓑ 9 15 9 5 9 15 9 5
ⓐ q 18 q 36 q 18 q 36 ⓑ 10 2 10 3 10 2 10 3
ⓐ t 10 t 40 t 10 t 40 ⓑ 8 3 8 5 8 3 8 5
ⓐ b b 9 b b 9 ⓑ 4 4 6 4 4 6
ⓐ x x 7 x x 7 ⓑ 10 10 3 10 10 3
Simplify Expressions with Zero Exponents
ⓐ 20 0 20 0 ⓑ b 0 b 0
ⓐ 13 0 13 0 ⓑ k 0 k 0
ⓐ − 27 0 − 27 0 ⓑ − ( 27 0 ) − ( 27 0 )
ⓐ − 15 0 − 15 0 ⓑ − ( 15 0 ) − ( 15 0 )
ⓐ ( 25 x ) 0 ( 25 x ) 0 ⓑ 25 x 0 25 x 0
ⓐ ( 6 y ) 0 ( 6 y ) 0 ⓑ 6 y 0 6 y 0
ⓐ ( 12 x ) 0 ( 12 x ) 0 ⓑ ( −56 p 4 q 3 ) 0 ( −56 p 4 q 3 ) 0
ⓐ 7 y 0 7 y 0 ( 17 y ) 0 ( 17 y ) 0 ⓑ ( −93 c 7 d 15 ) 0 ( −93 c 7 d 15 ) 0
ⓐ 12 n 0 − 18 m 0 12 n 0 − 18 m 0 ⓑ ( 12 n ) 0 − ( 18 m ) 0 ( 12 n ) 0 − ( 18 m ) 0
ⓐ 15 r 0 − 22 s 0 15 r 0 − 22 s 0 ⓑ ( 15 r ) 0 − ( 22 s ) 0 ( 15 r ) 0 − ( 22 s ) 0
ⓐ ( 3 4 ) 3 ( 3 4 ) 3 ⓑ ( p 2 ) 5 ( p 2 ) 5 ⓒ ( x y ) 6 ( x y ) 6
ⓐ ( 2 5 ) 2 ( 2 5 ) 2 ⓑ ( x 3 ) 4 ( x 3 ) 4 ⓒ ( a b ) 5 ( a b ) 5
ⓐ ( a 3 b ) 4 ( a 3 b ) 4 ⓑ ( 5 4 m ) 2 ( 5 4 m ) 2
ⓐ ( x 2 y ) 3 ( x 2 y ) 3 ⓑ ( 10 3 q ) 4 ( 10 3 q ) 4
( a 2 ) 3 a 4 ( a 2 ) 3 a 4
( p 3 ) 4 p 5 ( p 3 ) 4 p 5
( y 3 ) 4 y 10 ( y 3 ) 4 y 10
( x 4 ) 5 x 15 ( x 4 ) 5 x 15
u 6 ( u 3 ) 2 u 6 ( u 3 ) 2
v 20 ( v 4 ) 5 v 20 ( v 4 ) 5
m 12 ( m 8 ) 3 m 12 ( m 8 ) 3
n 8 ( n 6 ) 4 n 8 ( n 6 ) 4
( p 9 p 3 ) 5 ( p 9 p 3 ) 5
( q 8 q 2 ) 3 ( q 8 q 2 ) 3
( r 2 r 6 ) 3 ( r 2 r 6 ) 3
( m 4 m 7 ) 4 ( m 4 m 7 ) 4
( p r 11 ) 2 ( p r 11 ) 2
( a b 6 ) 3 ( a b 6 ) 3
( w 5 x 3 ) 8 ( w 5 x 3 ) 8
( y 4 z 10 ) 5 ( y 4 z 10 ) 5
( 2 j 3 3 k ) 4 ( 2 j 3 3 k ) 4
( 3 m 5 5 n ) 3 ( 3 m 5 5 n ) 3
( 3 c 2 4 d 6 ) 3 ( 3 c 2 4 d 6 ) 3
( 5 u 7 2 v 3 ) 4 ( 5 u 7 2 v 3 ) 4
( k 2 k 8 k 3 ) 2 ( k 2 k 8 k 3 ) 2
( j 2 j 5 j 4 ) 3 ( j 2 j 5 j 4 ) 3
( t 2 ) 5 ( t 4 ) 2 ( t 3 ) 7 ( t 2 ) 5 ( t 4 ) 2 ( t 3 ) 7
( q 3 ) 6 ( q 2 ) 3 ( q 4 ) 8 ( q 3 ) 6 ( q 2 ) 3 ( q 4 ) 8
( −2 p 2 ) 4 ( 3 p 4 ) 2 ( −6 p 3 ) 2 ( −2 p 2 ) 4 ( 3 p 4 ) 2 ( −6 p 3 ) 2
( −2 k 3 ) 2 ( 6 k 2 ) 4 ( 9 k 4 ) 2 ( −2 k 3 ) 2 ( 6 k 2 ) 4 ( 9 k 4 ) 2
( −4 m 3 ) 2 ( 5 m 4 ) 3 ( −10 m 6 ) 3 ( −4 m 3 ) 2 ( 5 m 4 ) 3 ( −10 m 6 ) 3
( −10 n 2 ) 3 ( 4 n 5 ) 2 ( 2 n 8 ) 2 ( −10 n 2 ) 3 ( 4 n 5 ) 2 ( 2 n 8 ) 2
In the following exercises, divide the monomials.
56 b 8 ÷ 7 b 2 56 b 8 ÷ 7 b 2
63 v 10 ÷ 9 v 2 63 v 10 ÷ 9 v 2
−88 y 15 ÷ 8 y 3 −88 y 15 ÷ 8 y 3
−72 u 12 ÷ 1 2 u 4 −72 u 12 ÷ 1 2 u 4
45 a 6 b 8 −15 a 10 b 2 45 a 6 b 8 −15 a 10 b 2
54 x 9 y 3 −18 x 6 y 15 54 x 9 y 3 −18 x 6 y 15
15 r 4 s 9 18 r 9 s 2 15 r 4 s 9 18 r 9 s 2
20 m 8 n 4 30 m 5 n 9 20 m 8 n 4 30 m 5 n 9
18 a 4 b 8 −27 a 9 b 5 18 a 4 b 8 −27 a 9 b 5
45 x 5 y 9 −60 x 8 y 6 45 x 5 y 9 −60 x 8 y 6
64 q 11 r 9 s 3 48 q 6 r 8 s 5 64 q 11 r 9 s 3 48 q 6 r 8 s 5
65 a 10 b 8 c 5 42 a 7 b 6 c 8 65 a 10 b 8 c 5 42 a 7 b 6 c 8
( 10 m 5 n 4 ) ( 5 m 3 n 6 ) 25 m 7 n 5 ( 10 m 5 n 4 ) ( 5 m 3 n 6 ) 25 m 7 n 5
( −18 p 4 q 7 ) ( −6 p 3 q 8 ) −36 p 12 q 10 ( −18 p 4 q 7 ) ( −6 p 3 q 8 ) −36 p 12 q 10
( 6 a 4 b 3 ) ( 4 a b 5 ) ( 12 a 2 b ) ( a 3 b ) ( 6 a 4 b 3 ) ( 4 a b 5 ) ( 12 a 2 b ) ( a 3 b )
( 4 u 2 v 5 ) ( 15 u 3 v ) ( 12 u 3 v ) ( u 4 v ) ( 4 u 2 v 5 ) ( 15 u 3 v ) ( 12 u 3 v ) ( u 4 v )
Mixed Practice
ⓐ 24 a 5 + 2 a 5 24 a 5 + 2 a 5 ⓑ 24 a 5 − 2 a 5 24 a 5 − 2 a 5 ⓒ 24 a 5 · 2 a 5 24 a 5 · 2 a 5 ⓓ 24 a 5 ÷ 2 a 5 24 a 5 ÷ 2 a 5
ⓐ 15 n 10 + 3 n 10 15 n 10 + 3 n 10 ⓑ 15 n 10 − 3 n 10 15 n 10 − 3 n 10 ⓒ 15 n 10 · 3 n 10 15 n 10 · 3 n 10 ⓓ 15 n 10 ÷ 3 n 10 15 n 10 ÷ 3 n 10
ⓐ p 4 · p 6 p 4 · p 6 ⓑ ( p 4 ) 6 ( p 4 ) 6
ⓐ q 5 · q 3 q 5 · q 3 ⓑ ( q 5 ) 3 ( q 5 ) 3
ⓐ y 3 y y 3 y ⓑ y y 3 y y 3
ⓐ z 6 z 5 z 6 z 5 ⓑ z 5 z 6 z 5 z 6
( 8 x 5 ) ( 9 x ) ÷ 6 x 3 ( 8 x 5 ) ( 9 x ) ÷ 6 x 3
( 4 y ) ( 12 y 7 ) ÷ 8 y 2 ( 4 y ) ( 12 y 7 ) ÷ 8 y 2
27 a 7 3 a 3 + 54 a 9 9 a 5 27 a 7 3 a 3 + 54 a 9 9 a 5
32 c 11 4 c 5 + 42 c 9 6 c 3 32 c 11 4 c 5 + 42 c 9 6 c 3
32 y 5 8 y 2 − 60 y 10 5 y 7 32 y 5 8 y 2 − 60 y 10 5 y 7
48 x 6 6 x 4 − 35 x 9 7 x 7 48 x 6 6 x 4 − 35 x 9 7 x 7
63 r 6 s 3 9 r 4 s 2 − 72 r 2 s 2 6 s 63 r 6 s 3 9 r 4 s 2 − 72 r 2 s 2 6 s
56 y 4 z 5 7 y 3 z 3 − 45 y 2 z 2 5 y 56 y 4 z 5 7 y 3 z 3 − 45 y 2 z 2 5 y
Everyday Math
Memory One megabyte is approximately 10 6 10 6 bytes. One gigabyte is approximately 10 9 10 9 bytes. How many megabytes are in one gigabyte?
Memory One gigabyte is approximately 10 9 10 9 bytes. One terabyte is approximately 10 12 10 12 bytes. How many gigabytes are in one terabyte?
Writing Exercises
Jennifer thinks the quotient a 24 a 6 a 24 a 6 simplifies to a 4 a 4 . What is wrong with her reasoning?
Maurice simplifies the quotient d 7 d d 7 d by writing d 7 d = 7 d 7 d = 7 . What is wrong with his reasoning?
When Drake simplified − 3 0 − 3 0 and ( −3 ) 0 ( −3 ) 0 he got the same answer. Explain how using the Order of Operations correctly gives different answers.
Robert thinks x 0 x 0 simplifies to 0. What would you say to convince Robert he is wrong?
ⓐ After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section.
ⓑ On a scale of 1-10, how would you rate your mastery of this section in light of your responses on the checklist? How can you improve this?
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Dividing Monomials
Learning outcomes.
- Divide monomials
Divide Monomials
In the previous module we reviewed all the properties of exponents. We will now use them to divide monomials. Later, you will use them to divide polynomials.
Find the quotient: [latex]56{x}^{5}\div 7{x}^{2}[/latex]
Find the quotient: [latex]63{x}^{8}\div 9{x}^{4}[/latex]
[latex]7{x}^{4}[/latex]
Find the quotient: [latex]96{y}^{11}\div 6{y}^{8}[/latex]
[latex]16{y}^{3}[/latex]
When we divide monomials with more than one variable, we write one fraction for each variable.
Find the quotient: [latex]{\dfrac{42{x}^{2}{y}^{3}}{-7x{y}^{5}}}[/latex]
Find the quotient: [latex]{\dfrac{-84{x}^{8}{y}^{3}}{7{x}^{10}{y}^{2}}}[/latex]
[latex]-{\dfrac{12y}{{x}^{2}}}[/latex]
Find the quotient: [latex]{\dfrac{-72{a}^{4}{b}^{5}}{-8{a}^{9}{b}^{5}}}[/latex]
[latex]{\dfrac{9}{{a}^{5}}}[/latex]
Find the quotient: [latex]{\dfrac{24{a}^{5}{b}^{3}}{48a{b}^{4}}}[/latex]
Find the quotient: [latex]{\dfrac{16{a}^{7}{b}^{6}}{24a{b}^{8}}}[/latex]
[latex]{\dfrac{2{a}^{6}}{3{b}^{2}}}[/latex]
Find the quotient: [latex]{\dfrac{27{p}^{4}{q}^{7}}{-45{p}^{12}{q}^{}}}[/latex]
[latex]-{\dfrac{3{q}^{6}}{5{p}^{8}}}[/latex]
Once you become familiar with the process and have practiced it step by step several times, you may be able to simplify a fraction in one step.
Find the quotient: [latex]{\dfrac{14{x}^{7}{y}^{12}}{21{x}^{11}{y}^{6}}}[/latex]
Be very careful to simplify [latex]{\dfrac{14}{21}}[/latex] by dividing out a common factor, and to simplify the variables by subtracting their exponents.
Find the quotient: [latex]{\dfrac{28{x}^{5}{y}^{14}}{49{x}^{9}{y}^{12}}}[/latex]
[latex]{\dfrac{4{y}^{2}}{7{x}^{4}}}[/latex]
Find the quotient: [latex]{\dfrac{30{m}^{5}{n}^{11}}{48{m}^{10}{n}^{14}}}[/latex]
[latex]{\dfrac{5}{8{m}^{5}{n}^{3}}}[/latex]
In all examples so far, there was no work to do in the numerator or denominator before simplifying the fraction. In the next example, we’ll first find the product of two monomials in the numerator before we simplify the fraction.
Find the quotient: [latex]{\dfrac{(3{x}^{3}{y}^{2})(10{x}^{2}{y}^{3})}{6{x}^{4}{y}^{5}}}[/latex]
Solution Remember, the fraction bar is a grouping symbol. We will simplify the numerator first.
Find the quotient: [latex]{\Large\frac{\left(3{x}^{4}{y}^{5}\right)\left(8{x}^{2}{y}^{5}\right)}{12{x}^{5}{y}^{8}}}[/latex]
[latex]2{xy}^{2}[/latex]
Find the quotient: [latex]{\Large\frac{\left(-6{a}^{6}{b}^{9}\right)\left(-8{a}^{5}{b}^{8}\right)}{-12{a}^{10}{b}^{12}}}[/latex]
[latex]-4{ab}^{5}[/latex]
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- Ex 1: Simplify Fractions. Authored by : James Sousa (Mathispower4u.com). Located at : https://youtu.be/_2Wk7jXf3Ok . License : CC BY: Attribution
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RWM102: Algebra
Unit 7: operations with monomials.
As we have seen, algebra involves the use of variables to represent unknown quantities in equations. Here we will begin the study of expressions that primarily consist of variables.
The rules that govern operations with these expressions arise from the properties of operations with numbers, such as the distributive property and the order of operations. In this unit we focus on monomials, which are expressions that contain only one term. We will learn how to multiply, divide, and apply rules of exponents to monomials.
Completing this unit should take you approximately 3 hours.
Upon successful completion of this unit, you will be able to:
- apply the rules of exponents to simplify algebraic exponential expressions; and
- multiply, divide, and simplify the powers of monomials.
7.1: Algebraic Exponential Expressions
The first mathematical functions we will explore are the exponential functions of monomials.
Read this article through the section on the product of powers property. This page reviews writing and solving exponential expressions. Pay attention to how we multiply monomials with exponents, the products of powers property, and example 2.
After you read, complete questions 2, 3, 6, 7, 8, 25, 26, 27 and 28 in the practice set and check your answers.
7.2: Manipulating Exponents
In this section, we will look at important rules for manipulating exponents.
Read this article, which shows the rules for multiplying exponents, taking the power of an exponent, and taking the exponent of a product. It may help to write a list of these properties to keep track of them. Watch the video to see a few examples.
After you read, complete questions 2, 3, 6, 7, 14, 15, 25, 26, 33, and 34 in the practice set and check your answers.
7.3: Quotient of Exponents and Power of a Quotient
The next important operation is the quotient of exponents, which is what we use when dividing monomials with exponents.
Read this article and pay attention to the quotient of powers property and the power of a quotient property in examples 1 and 2.
After you read, complete questions 1, 2, 5, 6, 12, and 13 in the practice set and check your answers.
7.4: Negative Exponents
In this section, we learn how to use negative exponents and how to translate between negative exponents and fractions.
Watch these videos, which walk you through the logic of why negative exponents can be written as fractions.
After you watch, complete this assessment and check your answers.
7.5: Multiplying Monomials
Now that you are comfortable with the rules of exponents, you are ready to apply them to functions of monomials. In this section, we will discuss multiplying monomials.
Read the section on multiplying monomials and the solution for example 6.26.
After you read, complete example 6.27 and check your answer.
7.6: Dividing Monomials
The last function we must apply to monomials is division.
This article gives an excellent review of the properties of monomials and exponents, as well as how to divide monomials. Review the summary of exponent properties, which goes over everything we discussed in this unit. After you read, complete examples 6.72 through 6.75 and check your work.
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4.7: Dividing Polynomials
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Learning Objective
- Divide by a monomial.
Dividing by a Monomial
Recall the quotient rule for exponents: if \(x\) is nonzero and \(m\) and \(n\) are positive integers, then
\[\frac{x^{m}}{x^{n}}=x^{m-n}\]
In other words, when dividing two expressions with the same base, subtract the exponents. This rule applies when dividing a monomial by a monomial. In this section, we will assume that all variables in the denominator are nonzero.
Example \(\PageIndex{1}\)
\(\frac{28y^{3}}{7y}\).
Divide the coefficients and subtract the exponents of the variable \(y\).
\(\begin{aligned} \frac{28y^{3}}{7y}&=\frac{28}{7}y^{3-1} \\ &=4y^{2} \end{aligned}\)
Example \(\PageIndex{2}\)
\(\frac{24x^{7}y^{5}}{8x^{3}y^{2}}\).
Divide the coefficients and apply the quotient rule by subtracting the exponents of the like bases.
\(\begin{aligned} \frac{24x^{7}y^{5}}{8x^{3}y^{2}}&=\frac{24}{8}x^{7-3}y^{5-2} \\ &=3x^{4}y^{3} \end{aligned}\)
\(3x^{4}y^{3}\)
When dividing a polynomial by a monomial, we may treat the monomial as a common denominator and break up the fraction using the following property:
\[\frac{a+b}{c}=\frac{a}{c}+\frac{b}{c}\]
Applying this property results in terms that can be treated as quotients of monomials.
Example \(\PageIndex{3}\)
\(\frac{−5x^{4}+25x^{3}−15x^{2}}{5x^{2}}\).
Break up the fraction by dividing each term in the numerator by the monomial in the denominator and then simplify each term.
\(-x^{2}+5x-3\cdot 1\)
Check your division by multiplying the answer, the quotient, by the monomial in the denominator, the divisor, to see if you obtain the original numerator, the dividend.
\[\color{Cerulean}{\frac{dividend}{divisor}=quotient}\]
\[\color{Cerulean}{dividend=divisor\cdot quotient}\]
\(\begin{aligned} 5x^{2}\cdot (-x^{2}+5x-3) &=\color{Cerulean}{5x^{2}}\color{black}{\cdot (-x^{2})+}\color{Cerulean}{5x^{2}}\color{black}{\cdot 5x-}\color{Cerulean}{5x^{2}}\color{black}{\cdot 3} \\ &=-5x^{4}+25x^{3}-15x^{2}\quad\color{Cerulean}{\checkmark} \end{aligned}\)
Example \(\PageIndex{4}\)
\(\frac{9a^{4}b−7a^{3}b^{2}+3a^{2}b}{−3a^{2}b}\).
\(-3a^{2}+\frac{7}{3}ab-1\). The check is optional and is left to the reader.
Exercise \(\PageIndex{1}\)
\((16x^{5}−8x^{4}+5x^{3}+2x^{2})÷(2x^{2})\).
\(8x^{3}−4x^{2}+\frac{5}{2}x+1\)
Key Takeaways
- When dividing by a monomial, divide all terms in the numerator by the monomial and then simplify each term. To simplify each term, divide the coefficients and apply the quotient rule for exponents.
Exercise \(\PageIndex{3}\) Dividing by a Monomial
- \(\frac{81y^{5}}{9y^{2}}\)
- \(\frac{36y^{9}}{9y^{3}}\)
- \(\frac{52x^{2}y}{4xy}\)
- \(\frac{24xy^{5}}{2xy^{4}}\)
- \(\frac{25x^{2}y^{5}z^{3}}{5xyz}\)
- \(\frac{−77x^{4}y^{9}z^{2}}{2x^{3}y^{3}z}\)
- \(\frac{125a^{3}b^{2}c}{−10abc}\)
- \(\frac{36a^{2}b^{3}c^{5}}{−6a^{2}b^{2}c^{3}}\)
- \(\frac{9x^{2}+27x−3}{3}\)
- \(\frac{10x^{3}−5x^{2}+40x−15}{5}\)
- \(\frac{20x^{3}−10x^{2}+30x}{2x}\)
- \(\frac{10x^{4}+8x^{2}−6x}{24x}\)
- \(\frac{−6x^{5}−9x^{3}+3x}{−3x}\)
- \(\frac{36a^{12}−6a^{9}+12a^{5}}{−12a^{5}}\)
- \(\frac{−12x^{5}+18x^{3}−6x^{2}}{−6x^{2}}\)
- \(\frac{−49a^{8}+7a^{5}−21a^{3}}{7a^{3}}\)
- \(\frac{9x^{7}−6x^{4}+12x^{3}−x^{2}}{3x^{2}}\)
- \(\frac{8x^{9}+16x^{7}−24x^{4}+8x^{3}}{−8x^{3}}\)
- \(\frac{16a^{7}−32a^{6}+20a^{5}−a^{4}}{4a^{4}}\)
- \(\frac{5a^{6}+2a^{5}+6a^{3}−12a^{2}}{3a^{2}}\)
- \(\frac{−4x^{2}y^{3}+16x^{7}y^{8}−8x^{2}y^{5}}{−4x^{2}y^{3}}\)
- \(\frac{100a^{10}b^{30}c^{5}−50a^{20}b^{5}c^{40}+20a^{5}b^{20}c^{10}}{10a^{5}b^{5}c^{5}}\)
- Find the quotient of \(−36x^{9}y^{7}\) and \(2x^{8}y^{5}\).
- Find the quotient of \(144x^{3}y^{10}z^{2}\) and \(−12x^{3}y^{5}z\).
- Find the quotient of \(3a^{4}−18a^{3}+27a^{2}\) and \(3a^{2}\).
- Find the quotient of \(64a^{2}bc^{3}−16a^{5}bc^{7}\) and \(4a^{2}bc^{3}\).
1. \(9y^{3}\)
5. \(5xy^{4}z^{2}\)
7. \(−\frac{25}{2}a^{2}b\)
9. \(3x^{2}+9x−1\)
11. \(10x^{2}−5x+15\)
13. \(2x^{4}+3x^{2}−1\)
15. \(2x^{3}−3x+1\)
17. \(3x^{5}−2x^{2}+4x−\frac{1}{3}\)
19. \(4a^{3}−8a^{2}+5a−\frac{1}{4}\)
21. \(−4x^{5}y^{5}+2y^{2}+1\)
23. \(−18xy^{2}\)
25. \(a^{2}−6a+9\)
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Unit 6 Homework 3: Dividing Monomials quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free!
Unit 6: exponents and exponential functions Date Homework 3 Hour Homework 3: Dividing Monomials Directions : Answer all questions. Show all work!!! Learning Target: I CAN divide exponents using the quotient rule. D i r e c t i o n s : S i m p li fy t h e f o l lo wi n g mo n o m ial s. 1. y 2 y 4 2. k 6 k 6 3. x 3 y x 4 y 5 4. n2 mn 3 85. 3a 15a 6.
From your earlier work with fractions, you know that: 2 2 = 1 17 17 = 1 − 43 − 43 = 1. In words, a number divided by itself is 1. So, x x = 1, for any x(x ≠ 0), since any number divided by itself is 1. The Quotient Property for Exponents shows us how to simplify am an when m > n and when n < m by subtracting exponents.
Name: _____ Unit 6: Exponents & Exponential Functions Date: _____ Homework 3: Dividing Monomials Directions: Simplify the following monomials. SHOW ALL STEPS! 1. y y 4 2 2. k k 6 6 3. xy xy 4 5 3 2 4. mn n 3 2 5. a a 15 3 3 6. xy xy 5 4 2 2 8 4 7. ab ab 5 7 3 7 6-2 8. xy xy 3 2 3-20-5 9. ab b 4 3-16 4 10. mn mn 8 5 5 4 21 27 11. xy xy 5 4 3-15 ...
Terms in this set (9) Monomial. A number, a variable, or a product of a number and one or more variables. To add or subtract monomials... Combine like terms; do not change the variables and exponents. What rule do you use to multiply monomials? The Product Rule: add the exponents of like terms. What rule do you use to raise a monomial to a ...
Unit 6: & Exponential Funcöons Homework 3: Dividing Monomials 8x5y4 4X2y2 16ab4 4b3 7p2q2 14p2q2 535 10 7 2 (6x y ) 5x6y2 10x4y monomials. SHOW ALL STEPS! 15a3 - 20x3y2 - 5x3y 11. 45xy3 343 (2a b ) (2ab2)5 2y5 3y2 20. 12x4y5 O Gina Wilson, 2012 +16a2 6a7b2 . Title: New Doc 1 Author: CamScanner Subject: New Doc 1 Created Date: 3/11/2015 3:10:12 ...
Terms in this set (12) Product of Powers: To multiply powers with like bases, add the exponents. Power of a Power: To raise a power to a power, multiply the exponents. Power of a Product: To raise a product inside parentheses to a power, apply the power to each factor inside the parentheses. Quotient of Powers: To divide powers with like bases ...
UNIT 6. EXPONENTS AND EXPONENTIAL FUNCTIONS HOMEWORK 3 DATE HOUR Homework 3: Dividing Monomials Directions: Answer all questions. Show all work!!! Learning Target: I CAN divide exponents using the quotient rule. Directions: Simplify the following monomials. x4v X3Y2 8x5 4_r2Y2 6a5 h7 21m 10. 27m5n4 —20x3v2 5x3 v —1 5x5v,4 11. 12. 4b 3 -I-IQ ...
LT 6.4 Learn with flashcards, games, and more — for free.
Exercise 5.6.48. Find the quotient: 30m5n11 48m10n14. In all examples so far, there was no work to do in the numerator or denominator before simplifying the fraction. In the next example, we'll first find the product of two monomials in the numerator before we simplify the fraction.
Introduction; 2.1 Solve Equations Using the Subtraction and Addition Properties of Equality; 2.2 Solve Equations using the Division and Multiplication Properties of Equality; 2.3 Solve Equations with Variables and Constants on Both Sides; 2.4 Use a General Strategy to Solve Linear Equations; 2.5 Solve Equations with Fractions or Decimals; 2.6 Solve a Formula for a Specific Variable
Solution. 56x5÷7x2 56 x 5 ÷ 7 x 2. Rewrite as a fraction. 56x5 7x2 56 x 5 7 x 2. Use fraction multiplication to separate the number. part from the variable part. 56 7 ⋅ x5 x2 56 7 ⋅ x 5 x 2. Use the Quotient Property. 8x3 8 x 3.
Unit 6: exponents and exponential functions Date ... E X T R A W O RK S P A C E Partl — Adding & Subtracting Monomials 7m — + 4m2 —3m 3. Find the sum of -2pq7 and -pq7. 4. Subtract -13xy from -5xy. ... Powers of Monomials 10. 12. 16. c Yd 15 2 18 a bc 12 2 3 a bc _4c12cÈ 20c4d 11. (3p7)4 Dividing Monomials PartlV - 13. 27y 15. Part V ...
Unit 6: Exponents Rules Homework 2: Powers of Monomials & Geometric Applications ** This is a 2-page document! ** Directions: Simplify the following monomials. 3. 6. ... Homework 3: Dividing Monomials SHOW ALL STEPS! 2xgg 2 -Halo L 2 Directions: Simplify the following monomials. 6a5b7 -2a3b7 21m8n 10. 27m5n (-2m ) 13. 81712 16. I q
MONOMIALS ADDiN9 SUBTRACTiN9 MONOMIALS Notes 'Examples A monomial IS a Examples: Monomials the same variables and exponents are To add or subtract monomials, DO NOT CHANGE the varables and exponents! Add or subtract the following 3 5. 9. 13. 15. 17x-25r -15a3bc + 6a3 bc 2ab + gac 2. 23y2+6yŽ 4. 38r y —xy 6. -8mn + gmn 2 cd2 _ 1 cd2 8. 10. 12 ...
EXAMPLE. Find the quotient: 56x5 ÷7x2 56 x 5 ÷ 7 x 2. Solution. 56x5÷7x2 56 x 5 ÷ 7 x 2. Rewrite as a fraction. 56x5 7x2 56 x 5 7 x 2. Use fraction multiplication to separate the number. part from the variable part. 56 7 ⋅ x5 x2 56 7 ⋅ x 5 x 2.
This page titled 10.6: Divide Monomials (Part 1) is shared under a not declared license and was authored, remixed, and/or curated by OpenStax. Back to top; 10.5: Multiply Polynomials (Part 2) 10.7: Divide Monomials (Part 2) Was this article helpful? Yes; No; Recommended articles. Article type Section or Page Author
area. Length x Width. what happens to negative monomials? you change it to a fraction ( x^-a = 1/x^a) exponential growth formula. y=a (1+r)^t. Exponential Decay Formula. y=a (1-r)^t. Study with Quizlet and memorize flashcards containing terms like when multiplying, monomials what do you do with the exponents?, when adding or subtracting ...
Step 1: To determine the first term of the quotient, divide the leading term of the dividend by the leading term of the divisor. Figure 6.5.1. Step 2: Multiply the first term of the quotient by the divisor, remembering to distribute, and line up like terms with the dividend. Figure 6.5.2.
In this unit we focus on monomials, which are expressions that contain only one term. We will learn how to multiply, divide, and apply rules of exponents to monomials. Completing this unit should take you approximately 3 hours. Upon successful completion of this unit, you will be able to: apply the rules of exponents to simplify algebraic ...
Unit 6: Exponents and Exponential functions Hour: Date Section Homework Friday February 8, 2019 Monomials: Add, Subtract, and Multiply p. 1 - 3 Homework 1: Adding, Subtracting, and Multiplying Monomials Monday February 11, 2019 Power Rule p. 4 - 5 Homework 2: Power Rule Tuesday February 12, 2019
Example 4.7.3. Divide: − 5x4 + 25x3 − 15x2 5x2. Solution: Break up the fraction by dividing each term in the numerator by the monomial in the denominator and then simplify each term. Answer: − x2 + 5x − 3 ⋅ 1. Check your division by multiplying the answer, the quotient, by the monomial in the denominator, the divisor, to see if you ...
Question: (ODD NUMBERS ONLY) Powers of Monomials & Geometric Applications and please show work as I am a visual learner. Here's the best way to solve it. Name: Unit 6: Exponents & Exponential Functions Date: Bell: Homework 2: Powers of Monomials & Geometric Applications ** This is a 2-page document! ** Directions: Simplify the following ...