AnswersCommon Core Algebra I B-ICFactoring Polynomials: Double Grouping

Factoring Trinomials: a = 1 Answers

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1
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Ms. Wilson draws a model of the factorization of a polynomial with integer factors. Her model is partially complete. Which equation is represented by Ms. Wilson’s model?

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A
n2 + 3n + 40 = (n – 8)(n – 5)
B
n2 + 13n + 40 = (n + 8)(n + 5)
C
n2 + 40n + 13 = (n + 8)(n + 5)
D
n2 + 40n + 3 = (n – 8)(n – 5)
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Which expression is the factorization of x2 + 10x + 21?

A
(x + 3)(x + 7)
B
(x + 4)(x + 6)
C
(x + 6)(x + 15)
D
(x + 7)(x + 14)
3

The diagram represents the factorization of x2 – 9x + 18. It is partially completed. Which two terms are missing from the diagram?

Question illustration
A
–x and –8x
B
–2x and –7x
C
–3x and –6x
D
–4x and –5x
4

What is the factored form of the polynomial?x2 + 9x +20

A
(x − 4)(x − 5)
B
(x − 2)(x − 10)
C
(x + 4)(x + 5)
D
(x + 2)(x + 10)

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