Factor completely. 4u^2 + 28u + 49

label Algebra
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A: 2(2u + 7)2

B: (2u + 4)2

C:  (2u + 7)2

D: (4u – 7)2

Apr 7th, 2015

C:  (2u + 7)2

4u^2 - 28u + 49
(2u - 7) (2u - 7)
2u times - 7 = - 14u, and - 7 times 2u = -14u
the middle term is made by adding - 14u to - 14u
the end term is made by multiplying - 7 by - 7
thus: (2u - 7) squared

Apr 7th, 2015

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