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Homework Help: I need help with integration

  1. Mar 30, 2008 #1
    1. The problem statement, all variables and given/known data

    Hi everyone
    im stuck with the following integration..

    2. Relevant equations

    integral of dx/(5-4x-(x^2))^(5/2)

    3. The attempt at a solution

    can anyone help me?
    thanks
     
  2. jcsd
  3. Mar 30, 2008 #2

    tiny-tim

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    Science Advisor
    Homework Helper

    … complete the square … !

    Hi joseph! :smile:

    With quadratics, it's usually best to start by completing the square:

    5 - 4x - x^2 = 9 - (x + 2)^2.

    (And then you can even change to y = x + 2, dy = dx, if you like!)

    Does that help? :smile:
     
  4. Mar 30, 2008 #3
    OH YEAH!!
    i never thought of that!
    thanks alot!
     
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