AnswersCommon Core Algebra I B-ICFactoring Polynomials: Double Grouping

Factoring Polynomials: Double Grouping Answers

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Factor the polynomial 3x4 – 2x2 + 15x2 – 10 by grouping.Which product is the factored form of the polynomial?

A
(–x2 – 5)(3x2 + 2)
B
(x2 – 2)(3x2 + 5)
C
(x2 + 5)(3x2 – 2)
D
(3x2 – 5)(x2 + 2)
7

Which statements are true about the polynomial 4x3 – 6x2 + 8x – 12? Check all that apply.The terms 4x3 and 8x have a common factor.The terms 4x3 and – 6x2 have a common factor.The polynomial is prime.The factored polynomial is (2x2 – 3)(2x + 4).The polynomial can be grouped in different ways to factor by grouping.

A
The terms 4x3 and 8x have a common factor.
B
The terms 4x3 and – 6x2 have a common factor.
C
The polynomial is prime.
D
The factored polynomial is (2x2 – 3)(2x + 4).
E
The polynomial can be grouped in different ways to factor by grouping.
8

Which polynomial has (3x + 2) as a binomial factor?

A
6x3 + 3x2 + 4x + 2
B
12x2 + 15x + 8x + 10
C
18x3 – 12x2 + 9x – 6
D
21x4 + 7x3 + 6x + 2
9

Which polynomials are prime? Check all that apply.15x2 + 10x – 9x + 720x2 – 12x + 30x – 186x3 + 14x2 – 12x – 28 8x3 + 20x2 + 3x + 1211x4 + 4x2 – 6x2 – 16

A
15x2 + 10x – 9x + 7
B
20x2 – 12x + 30x – 18
C
6x3 + 14x2 – 12x – 28
D
8x3 + 20x2 + 3x + 12
E
11x4 + 4x2 – 6x2 – 16
10

Talia noticed that she does not have a common factor. What should she do?

A
Talia needs to leave the polynomial as is because it is prime and cannot be factored.
B
Talia needs to factor out a 3x from the first group and a 4x from the second group.
C
Talia needs to factor out a negative from one of the groups so the binomials will be the same.
D
Talia needs to apply the distributive property to get the expression (3x + 4)(5x – 1).
11

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. What is the resulting expression?

A
(4x2 + 3)(x2 – 5)
B
(4x2 – 3)(x2 – 5)
C
(4x2 – 5)(x2 + 3)
D
(4x2 + 5)(x2 – 3)
12

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