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Help evaluating these integrals

  1. Sep 5, 2004 #1
    Sorry I dont know how to use the notation, but help me solve the following through the u substitution.

    1) dx/square root of x^2+5x

    2)dx/x^2*square root of 1-x^2

    I am embarassed that I am not able to solve these still after devoting much thought, but help from anyone will be appreciated.
  2. jcsd
  3. Sep 6, 2004 #2


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    (1) Complete the square

    (2) Let u = 1/x
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