SOLUTION: Solve x^2+4x=-20

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Question 633741: Solve
x^2+4x=-20
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+4x=-20
x^2+4x+20=0
cannot be factored
so we use complete the square.
x^2+4x=-20
x^2+4x+4=-16
(x+2)^2=-16
x+2=sqrt(-16)
x=-2+4i
x=-2-4i