Hey, I have two problems here that I really don't know how to start. Hopefully someone can help me out!

**Question**
Prove that

**Solution **
I don't know where to start with this problem. I know that

. I don't know how to apply this to this equation. A similar problem in the examples of my text is: "simplify:

.

To simplify this the text first let y =

. Then it jumps to

. I don't understand this step in their example and this may prove to be the problem I am having.

I hope I am making sense here! I have another problem, but I figure once I get help with this one I can force my way though the second. Please help!