solving this \(x^2+14x=-13\)

got to \((x+7)^2=36\)

now i have i have to square root both sides. sqrt of 36 is obv -/+ 6

how do i square the oher side?

If you know (x + 7)^2 = 36, then square rooting both sides would get rid of the squared symbol on the left side of the equation. Hence, you can get that x + 7 = +/- 6

You have two cases, x + 7 = 6 and x + 7 = -6.

Solving for both, you obtain: x = -1 and x = -13