Khan/khan-exercises — Issue #6691: Quadratic equation - answer is wrong
Author: KhanBugz
Created: 2011-11-19 14:07:42+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

the answer of the question should be ±√21-5

which is not given in the options so i chose 'none of these' but it says my answer is incorrect
and the second option 5±√29 is correct

[quadratic_equation.html?seed=113&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadratic_equation.html?seed=113&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadratic_equation.html?seed=113&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C206%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C241%5D%2C%5B%22correct-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%20%5C%5C%5C%22%3Ex%20%3D5%20%5C%5C%5C%5Cpm%20%5C%5C%5C%5Csqrt%7B29%7D%3C%2Fcode%3E%5C%22%22%2C136%5D%5D)

["None of the above.","None of the above.","x =5 \\pm \\sqrt{29}"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.120 Safari/535.2

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