Khan/khan-exercises — Issue #15746: Solving quadratics by taking the square root - Possible calculation error
Author: KhanBugz
Created: 2012-03-08 19:55:29+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: kjetill.gunnarson@norway.com

Entered x=1 or x=-11 and still getting non-smiley face. Believe there is an error here, as steps show 1 or -11

[solving_quadratics_by_taking_the_square_root.html?seed=68&problem=solve](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_quadratics_by_taking_the_square_root.html?seed=68&problem=solve&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_quadratics_by_taking_the_square_root.html?seed=68&problem=solve&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%221%5C%22%2C%5C%22--11%5C%22%5D%22%2C40%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%5D)

[["1","--11"]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

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