SOLUTION: x2 +4x +4 = 7 It says solve for x. I need help on this question.

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Question 45379: x2 +4x +4 = 7 It says solve for x.
I need help on this question.

Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay from
x^2 + 4x + 4 = 7
subtract 7 and get
x^2 + 4x - 3 = 0
now apply the quadratic formula and get
x = (-4 ± sqrt(16 + 12)) / 2
x = (-4 ± sqrt(28)) / 2
x = (-4 ± 2*sqrt(7)) / 2
x = -2 ± sqrt(7)