SOLUTION: I have to complete the square of x^2+6x+8=0

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Question 751269: I have to complete the square of x^2+6x+8=0
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+6x+8=0

The term to add and subtract corresponds to %28b%2F2%29%5E2 from the expression, x%5E2%2Bb%2Fa%2Bc%2Fa. The term for your example would be %286%2F2%29%5E2=9.

x%5E2%2B6x%2B8%2B9-9
x%5E2%2B6x%2B9%2B8-9
%28x%5E2%2B6x%2B9%29%2B8-9
%28x%2B3%29%5E2%2B%28-1%29
or simply
highlight%28%28x%2B3%29%5E2-1%29