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Fractions Question

  1. Mar 22, 2007 #1
    1. The problem statement, all variables and given/known data
    Can someone please give me the methodology/rules for this to happen?
    2. Relevant equations

    3. The attempt at a solution
    I know there is nothing you can factor out here so I am confused as to how this result is possible.

    Any help appreciated.
  2. jcsd
  3. Mar 22, 2007 #2


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    Homework Helper

    Start by dividing the numerator through by R^4. See what you think after that. Then look at the denominator. I don't see where the negative sign in front ends up going to though.
  4. Mar 23, 2007 #3
    Thank you, Hage567 that helped me. The negative sign I just forgot when I typed in it really should be there.

    I forgot that that you don't need to divide the whole equation just the denominator or numerator when trying to cancel out.
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