matthewdawson4699 matthewdawson4699

27-04-2018
Mathematics

contestada

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)

Respuesta :

xxxunknown xxxunknown

27-04-2018

the answer is A. (X-3)(x+7)

Answer Link

TheWiseOrange TheWiseOrange

27-04-2018

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

Explanation:

x² + 4x – 21 = (x + 7)(x - 3)

x \ / 7 7x
\ /
/ \
x/ \ -3 -3x
---------------------------
x² -21 +4x
----------------------------

Answer Link

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