I had a worksheet with quite a few on it and there are two that I just cannot figure out.

The first one is:

I know that

so I replaced it so that it is

I'm not sure if that is even in the right direction but I would really appreciate some help.

The second one is:

=

I tried multiplying the left side by the denominater's conjugate and just got

from there I don't know where to go or if I'm even on the right track. Thanks for any help!