Fractions....

negatifzeo

1. The problem statement, all variables and given/known data
I feel really stupid asking this, but I'm working on infinite series and my answer is sqrt(2)/(sqrt(2)-1) The book simplifies this to 2 + sqrt(2) and I don't know how this simplification occurs. I'm sure the answer is really obvious and I sure feel stupid not seeing it! Any help is appreciated.


2. Relevant equations



3. The attempt at a solution

negatifzeo

nevermind, I see now that it was the conjugate..... :)