I'm just not getting this at all, and I lost the page from class where he did it.

I asked before and didn't get much further. I know there are a few methods for doing this.

The initial problem is the integral of dx/(x^2-1)^2 , I'm supposed to integrate by using partial fractions. I get to the point where, if I label my unknowns A, B, C, and D, I can figure out B and D are 1/4. Then I get stuck.

What's the easiest way to tackle this?

Thanks!