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Simplifying this equation

  1. Sep 8, 2011 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    i was really dumb to think laws of logarithms would help me, but obviously not...

    3. The attempt at a solution

    the only thing i know is that the a's cant cancel!! i dont know what to do !!!
  2. jcsd
  3. Sep 8, 2011 #2
    Think about the following:




    In the problem you presented think FOIL.
  4. Sep 8, 2011 #3


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    Homework Helper

    Do you mean this?
    BTW, I don't mean to nitpick, but this is not an equation. It is an expression. Please don't confuse the two.

    If that's an a times negative b at the end, then that is not correct. We need to use one of the properties of exponents, mainly this one:
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