Find f'(x) for the function

This is Calc 1, so we have to do this the long way for a little while longer, so I have to use the formula

I can't seem to get this one going. I can easily simplify it down to:

But then I don't know where to take it. There is no easy conjugate to multiply by, and I don't see any way to factor the numerator. Can anybody give me a hint about what operation to try on this thing to move it along?

Thanks.