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Factor the trinomial below. x2 + 4x – 21 A. (x – 3)(x + 7) B. (x + 3)(x – 7) C. (x + 3)(x + 7) D. (x – 3)(x – 7)
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3 votes
Factor the trinomial below.

x2 + 4x – 21

A. (x – 3)(x + 7)
B. (x + 3)(x – 7)
C. (x + 3)(x + 7)
D. (x – 3)(x – 7)

User Maryline
by
5.5k points

2 Answers

1 vote
Answer: (x + 7)(x - 3)


Step-by-step explanation:

x² + 4x – 21 = (x + 7)(x - 3)


x \ / 7 7x
\ /
/ \
x/ \ -3 -3x
---------------------------
x² -21 +4x
----------------------------
User Jim Ford
by
5.9k points
3 votes
the answer is A. (X-3)(x+7)


User MentholBonbon
by
5.9k points
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