Khan/khan-exercises — Issue #13020: Simplifying expressions with exponents - (v1)4/(v2r−1)−2
Author: KhanBugz
Created: 2012-02-03 20:42:16+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: fantasycomedian@gmail.com

Khan Academy Answer: v8r−2

Why is (iow, how did) the "r" (become) a negative 2?

[simplifying_expressions_with_exponents.html?seed=102&problem=simplify-exponential-form-mini](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/simplifying_expressions_with_exponents.html?seed=102&problem=simplify-exponential-form-mini&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/simplifying_expressions_with_exponents.html?seed=102&problem=simplify-exponential-form-mini&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%220%5C%22%2C%5C%222%5C%22%5D%22%2C32%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C9%5D%5D)

[["0","2"]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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