Hi everyone!

I need a helping hand here with factoring this denominator:

$\displaystyle \frac {-5x + 15}{x^2 + 2x - 63}$

I feel a bit stupid, can I use completing the square? Or do I need to use the quadratic formula? If I complete the square I think I got...

$\displaystyle (x-1)^2 - 64$

I don't know, rather confused.