(x^2-x-20)/(x^2-25)

Question

My teacher said that the first step is to factor everything. I know that x^2-25 is factored as (x-5) (x+5), but still need help with factoring x^2-x-20.

Answer 1

It is (x-5)(x+4)

just having the problem given the way it was, you ought to have looked for a factor in common with the numerator.

Don't let the teacher be cleverer than you!

Answer 2

thanks!