1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    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:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook