Factoring Polynomials: Sum and Difference of Cubes Answers

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1
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Which expression is equivalent to ?

Question illustration
A
7x3y4z2
B
7x3y6z2
C
49x3y6z2
D
49x3y4z2
2
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What is the factorization of 729x15 + 1000?

A
(9x5 + 10)(81x10 – 90x5 + 100)
B
(9x5 + 10)(81x5 – 90x10 + 100)
C
(9x3 + 10)(81x6 – 90x6 + 100)
D
(9x3 + 10)(81x9 – 90x3 + 100)
4

What is the factorization of 216x12 – 64?

A
(6x3 – 4)(36x6 + 24x3 + 16)
B
(6x3 – 4)(36x9 + 24x3 + 16)
C
(6x4 – 4)(36x8 + 24x4 + 16)
D
(6x4 – 4)(36x12 + 24x4 + 16)
5

A and B are monomials where A = 125 and B = 27p12. What is the factored form of A – B?

A
(5 – 3p4)(25 + 15p4 + 9p8)
B
(25 – 3p4)(5 + 15p3 + 9p3)
C
(25 – 3p4)(5 + 15p4 + 3p8)
D
(5 – 3p4)(25 + 15p3 + 3p4)
6

What is 125x9 + 64y12 written as a sum of cubes?

(
(25x3)3 + (4y4)3
(
(5x3)3 + (16y4)3
(
(25x3)3 + (8y4)3
(
(5x3)3 + (4y4)3
8

Which is the factorization of x3 + 8?

A
(x + 2)(x2 – 2x + 4)
B
(x – 2)(x2 + 2x + 4)
C
(x + 2)(x2 – 2x + 8)
D
(x – 2)(x2 + 2x + 8)
9

The factorization of 8x3 – 125 is (2x – 5)(jx2 + kx + 25). What are the values of j and k?

j
j = 6 and k = –10
j
j = 8 and k = 10
j
j = 4 and k = 25
j
j = 4 and k = 10
11

Which expression is equivalent to ?

Question illustration
6
6xy2z4
1
18xy3z6
3
36xy2z4
7
72xy3z6
12

Which monomial is a perfect cube?

A
49p9q3r24
B
81p12q15r12
C
121p9q3r6
D
343p6q21r6
13

Which statements are true about a perfect cube monomial and its roots? Check all that apply.A perfect cube monomial must have exponents on the variables.A perfect cube monomial must have three identical roots, such that the product of the roots equal the perfect square monomial.The coefficient of the monomial must be divisible by 3.Any monomial can be a perfect cube root.The least common multiple of all the exponents on variables of a perfect cube monomial must be 3.It must be possible for the coefficient of a perfect cube monomial to be written in the form n3, where n equals the cube root of the coefficient.

A
A perfect cube monomial must have exponents on the variables.
B
A perfect cube monomial must have three identical roots, such that the product of the roots equal the perfect square monomial.
C
The coefficient of the monomial must be divisible by 3.
D
Any monomial can be a perfect cube root.
E
The least common multiple of all the exponents on variables of a perfect cube monomial must be 3.
F
It must be possible for the coefficient of a perfect cube monomial to be written in the form n3, where n equals the cube root of the coefficient.
14

Which is a difference of cubes?

x
x6 – 27
x
x15 – 36
x
x16 – 64
x
x5 – 125
15

Which product will result in a sum or difference of cubes?

A
(x + 7)(x2 – 7x + 14)
B
(x + 8)(x2 + 8x + 64)
C
(x – 9)(x2 + 9x + 81)
D
(x – 10)(x2 – 10x + 100)

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