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Stumped on an easy fraction problem

  1. Jan 16, 2007 #1
    Here is the fraction that I don't know how to combine and simplify, please help me out! Thanks! =]

    [tex]\frac{5}{a} + \frac{4}{2a-6} + \frac {-4a}{a^{2}-9}[/tex]

    I found the common denominator I think: (x+3)(x-3) .. but how do you make {a} in that form?
     
  2. jcsd
  3. Jan 16, 2007 #2

    cristo

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    If I write it as [tex]\frac{5}{a}+\frac{2}{(a-3)}-\frac{4a}{(a+3)(a-3)}[/tex] does it help?
     
    Last edited: Jan 16, 2007
  4. Jan 16, 2007 #3

    cristo

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    Ok, I didn't see the bit you'd edited. The common denominator will be a(a+3)(a-3).
     
  5. Jan 16, 2007 #4
    oh ok, I knew there wasn't a way to make {a} into {(a+3)(a-3)}. Thanks for your help! =]
     
  6. Jan 16, 2007 #5

    cristo

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    You're very welcome!
     
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