Question

2x^2+12x+18/x^2-x-12

Answer 1

Should there be some brackets in there maybe?
(2x^2+12x+18)/(x^2-x-12)

Answer 2

Assuming that's a yes, try factorising both polynomials, it should make it easier:
\[\frac{2(x+3)(x+3)}{(x-4)(x+3)}\]