SOLUTION: solve quadratic equation by completing the square -x^2-2x=5

SOLUTION: solve quadratic equation by completing the square -x^2-2x=5

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Question 556549: solve quadratic equation by completing the square
-x^2-2x=5

Answer by mathstutor494(120) (Show Source): You can put this solution on YOUR website!
-x^2-2x=5
> x^2+2x+5=0
> x^2+2x+1+4=0
> (x+1)^2=-4
>(x+1)^2=4i^2
So x+1 = +-2i
x= -1+-2i
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