Hello everyone,

I didn't know how to proceed with the following question:

Given find in terms of

I started off by squaring both sides, which I am pretty sure is the right thing to do, but I still can't figure out how to get p on its own on the left hand side.

In the back of the book the answer is

I tried to work backwards from this, but I still can't figure it out. Any help would be appreciated.

Regards,

evanator