Factoring Polynomials: Double Grouping

Question 1

Which polynomial is prime?

Revolt · Accepted Answer

2x4 + x3 – x + 2

Question 2

Which shows one way to determine the factors of x3 – 9x2 + 5x – 45 by grouping?

Revolt · Accepted Answer

x(x2 + 5) – 9(x2 + 5)

Question 3

Which polynomial is prime?

Revolt · Accepted Answer

3x3 – 2x2 + 3x – 4

Question 4

The polynomial 10x3 + 35x2 − 4x − 14 is factored by grouping. 10x3 + 35x2 − 4x − 145x2(____) − 2(____)What is the common factor that is missing from both sets of parentheses?

Revolt · Accepted Answer

2x + 7

Question 5

Factor 15x3 – 5x2 + 6x – 2 by grouping. What is the resulting expression?

Revolt · Accepted Answer

(5x2 + 2)(3x – 1)

Question 6

Which polynomial is prime?

Revolt · Accepted Answer

9x3 + 11x2 + 3x – 33

Question 7

Factor x3 – 4x2 + 7x – 28 by grouping. What is the resulting expression?

Revolt · Accepted Answer

(x2 + 7)(x – 4)

Question 8

Factor x3 + x2 + x + 1 by grouping. What is the resulting expression?

Revolt · Accepted Answer

(x2 + 1)(x + 1)

Question 9

Which shows one way to determine the factors of x3 + 4x2 + 5x + 20 by grouping?

Revolt · Accepted Answer

x2(x + 4) + 5(x + 4)

Question 10

Factor –8x3 – 2x2 – 12x – 3 by grouping. What is the resulting expression?

Revolt · Accepted Answer

(–2x2 – 3)(4x + 1)

Factoring Polynomials: Double Grouping Answers

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