next move to do what? Are you trying to factor it completely?

It can't be factored further over the rationals.

If you want to find the all the factors over the real numbers apply the quadratic formula to find the 2 roots, $r_1$ and $r_2$, of $2x^2-3x-36$

and your final factorization will be

$2x(x-r_1)(x-r_2)$