SOLUTION: quadratic equation completing the square x^2+4x-32=0 please work this one for me I'm stumped....answer is 4,-8

Question 84680: quadratic equation completing the square
x^2+4x-32=0
please work this one for me I'm stumped....answer is 4,-8
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
completing the square means making a "perfect square" out of the quadratic ... you can't change the x terms, but the numbers are fair game

x^2+4x=32 ... to make a perfect square; take half of the x coefficient, square it, and add

(4/2)^2=4 ... x^2+4x+4=32+4 ... (x+2)^2=36 ... take square root x+2=+-6 ... so x=4 and x=-8
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