Attachment 26023

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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- Dec 2nd 2012, 08:34 AMkevindorwardSimplifying Expression
Attachment 26023

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 ? - Dec 2nd 2012, 09:09 AMtopsquarkRe: Simplifying Expression
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

$\displaystyle \frac{r^8q^{-3}}{r^{-4}q^5}}$

I put this as

$\displaystyle \frac{r^8r^4}{q^3q^{5}}$

Then I simplify.

-Dan