find the x-coordinates of the points of intersection for the following functions below

$\displaystyle \\f(x) = x^{2} + 12x + 32\\g(x) = -x^{2} - 12x - 31$

My calculator shows 2 parabolas that cross, but the answers have square roots in them (showing me that it should be done w/o a calculator). Can anyone show me how to find the intersection of a parabola? Thanks!