I just cant seem to get it. i know its simple, but i keep geting lost with the exponents, could anyone help?

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- Sep 15th 2009, 09:05 PMsnypeshowsimplifying with exponents
I just cant seem to get it. i know its simple, but i keep geting lost with the exponents, could anyone help?

http://img3.imageshack.us/img3/8582/259003.gif - Sep 15th 2009, 09:29 PMpickslides
- Sep 16th 2009, 01:26 PMsnypeshow
so for the top part,

*(a-b) = m*and*(a+b)*would be*n*, so you would get(a-b)(a+b)/x^b^2

which would give you $\displaystyle x^(a^2 - b^2)$

so would the answer be x^a^2 because there would be 2 x^b^2, both in the divisor and divident, so it would cancel it out? - Sep 16th 2009, 01:56 PMpickslides
I think I am following what you are saying, not 100% sure it is correct.

__Spoiler__: - Sep 16th 2009, 06:34 PMsnypeshow
$\displaystyle x^{(a^2-b^2)-b^2}$

why the $\displaystyle -b^2$ at the end? - Sep 16th 2009, 07:07 PMpickslides
$\displaystyle

a^m\div a^n = a^{m-n}

$ - Sep 16th 2009, 07:15 PMsnypeshow
oh yeah i completely forgot about that, i though they'd just cancel each other out

thanks alot!!!