SOLUTION: please help me solve this quadratic function :y=x^2+8x=21

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Question 368312: please help me solve this quadratic function :y=x^2+8x=21
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I'm assuming this is your equation,
x%5E2%2B8x=21
%28x%5E2%2B8x%2B16%29=21%2B16
%28x%2B4%29%5E2=37
x%2B4=0+%2B-+sqrt%2837%29
highlight%28x=-4+%2B-+sqrt%2837%29%29