Khan/khan-exercises — Issue #13115: Pre-algebra challenge - I dont know how to do this
Author: KhanBugz
Created: 2012-02-05 17:17:47+00:00
State: open
Labels: chrome, hard, win7

i cant find the answer to this problem

[pre-algebra_challenge.html?seed=134&problem=perfect-squares (simplifying_radicals)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=134&problem=perfect-squares&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=134&problem=perfect-squares&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B10%2C10%5D%22%2C47%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

[[10,10]]

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

MathJax is loaded, ready, queue length: 0