Question

Solutions of x^2+12x+10=0 complete the square

Answer 1

You take the coefficient of the second term, (12x) and multiply it by 1/2, then square the result
((1/2)*12)^2 = 36

So you plug it in

(x^2 + 12 x + 36) + 10 - 36 = 0
(x+6)(x+6) + 10 - 36 = 0
(x+6)^2 = 26

Uh, solution is ^ ;D