SOLUTION: Solve the equation by completing the square x^2 + 16x + 43 = 0

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Question 100955: Solve the equation by completing the square
x^2 + 16x + 43 = 0
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + 16x = -43
x^2+16x+(16/2)^2=-43+(16/2)^2
x^2+16x+(16/2)^2=-43+64
x^2+16x+(8)^2=21
(x+8)(x+8)=21
(x+8)^2=21
%28sqrt%28x%2B8%29%5E2%29%29=%28sqrt%2821%29%29
x+8=%28sqrt%2821%29%29
x= -8 -+ %28sqrt%2821%29%29