4. Factor the expression. 4b2 + 28b + 49 QA (2b + 7)2 OB (2b - 72 C (-2b + 7)2 OD 2(b - 7)2

asked Jan 8, 2021 61.6k views

5 votes

4. Factor the expression.

4b2 + 28b + 49
QA (2b + 7)2
OB (2b - 72
C (-2b + 7)2
OD 2(b - 7)2

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6 votes

Answer:

A.
(2b+7)^2

Explanation:

$4b^2 +28b + 49\\=(2b)^2 + 2* 2b* 7 + (7)^2\\=(2b+7)^2$

Davivid answered Jan 14, 2021