SOLUTION: please help solve the quadratic equation by completing the square x^2+12x+30=0

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Question 139450: please help
solve the quadratic equation by completing the square
x^2+12x+30=0
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
subtracting 30 __ x^2+12x=-30

adding the square of half of the x coefficient __ x^2+12x+(12/2)^2=-30+(12/2)^2

x^2+12x+36=6 __ taking square root __ x+6=+-sqrt(6)

subtracting 6 __ x=-6 +- sqrt(6)