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Math Help - Simplifying Expression

  1. #1
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    Simplifying Expression

    Simplifying Expression-photo-4-.jpg

    so i divide the 15 & 18 by 3 to get 5/6
    R8 - (-4) = r12
    Q(-4)-3 = Q(-7)

    just wondered which went on top or bottom ?
    am i right in saying that r12 goes on top cause the r8 is a positive power ?
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  2. #2
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    Re: Simplifying Expression

    Quote Originally Posted by kevindorward View Post
    Click image for larger version. 

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    so i divide the 15 & 18 by 3 to get 5/6
    R8 - (-4) = r12
    Q(-4)-3 = Q(-7)

    just wondered which went on top or bottom ?
    am i right in saying that r12 goes on top cause the r8 is a positive power ?
    Yes, positive exponents go up top and negative exponents go on the bottom.

    Typically when I start a problem like this I put all exponents as positive. For example
    \frac{r^8q^{-3}}{r^{-4}q^5}}

    I put this as
    \frac{r^8r^4}{q^3q^{5}}

    Then I simplify.

    -Dan
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