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How to simplify sqrt(2)/(sqrt(2) - 1) to 2 + sqrt(2)

  1. Feb 23, 2009 #1
    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
     
  2. jcsd
  3. Feb 23, 2009 #2
    Re: Fractions....

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