Khan/khan-exercises — Issue #15755: Simplifying expressions with exponents - negatives
Author: KhanBugz
Created: 2012-03-08 21:47:57+00:00
State: open
Labels: chrome, hard, win7

Reporter: danny81299@gmail.com

(p^6)/((p^9)(x^9))
equals
((p^6)/(p^9))*((1)/(x^9))
equals
(p^6-9)*(x^-9)

How did the exponent for base "x" in the last step become negative?

[simplifying_expressions_with_exponents.html?seed=22&problem=simplify-exponential-form-mini](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/simplifying_expressions_with_exponents.html?seed=22&problem=simplify-exponential-form-mini&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/simplifying_expressions_with_exponents.html?seed=22&problem=simplify-exponential-form-mini&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%229%5C%22%5D%22%2C25%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22correct-activity%22%2C%22%5B%5C%22-3%5C%22%2C%5C%22-9%5C%22%5D%22%2C44%5D%5D)

[["-3","9"],["-3","-9"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

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