You may want to review factoring simple polynomials and factoring by grouping first.

If the polynomial you have to factor starts with a number, like
2*x*^{2} − 3*x* − 9, then we use the
so-called AC method. We look for two numbers which add to the
number in front of the *x* (here −3) and multiply to
the product of the other two numbers (here 2 and −9, whose
product is −18). These are 3 and −6. Now we can
rewrite the polynomial as 2*x*^{2} + 3*x*
− 6*x* − 9. (In general, we always break up the
term with the *x*.) This can be factored by grouping, giving
(2*x* + 3)(*x* − 3).

If it looks like 2*x*^{2} − 3*xy* −
9*y*^{2}, we deal with them the same way we did with
easier polynomials. In this example, say, it would factor as
(2*x* + 3*y*)(*x* − 3*y*).