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Simplify: a^7 b^8 /a^4b^4 Would the answer be a11/b12? For some reason, I had the idea that you were always supposed to add the exponents. But since this is division would you subtract the exponents instead?

Mathematics
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\[\frac{x^a}{x^b}=x^{a-b}\]
Reason: \[x^a \cdot x^b = x^{a+b}\]\[\frac{1}{x^b} = x^{-b}\] So, \[\frac{x^a}{x^b} = x^a \frac{1}{x^b} = x^{a} \cdot x^{-b}=x^{a+(-b)}=x^{a-b}\]
For the answers to your questions, it is not a^11 / b^12. When it is division, you will do subtraction for the power of the same base.

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Other answers:

Thanks for explaining it - I was trying to write it all down! :)
:O You're welcome!
the answer is a^3b^4
if it's a fraction you just deduct the exponent of the numerator to the exponent of the denominator..

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