Integration using given substitution difficulty.

Hello again,

Just when I think I'm getting it I realize I'm really not.

I have no idea how to approach this question, I have a bunch like this to do and would really appreciate some help.

The question is, using the substitution:

Evaluate the integral:

I know that:

that and that but have no idea how to proceed. I have looked in all my text books but can't't find an example similar enough to help me figure out what to do.

Thank you.

Re: Integration using given substitution difficulty.

Use implicit differentiation to find du/dx

From

Replace

with

And replace with