Khan/khan-exercises — Issue #11304: Quadratic equation - Answers
Author: KhanBugz
Created: 2012-01-15 21:45:57+00:00
State: open
Labels: hard, ie8, ie9, win7

the answer isn't in the same form every time

[quadratic_equation.html?seed=106&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadratic_equation.html?seed=106&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadratic_equation.html?seed=106&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22%3CCODE%20style%3D%5C%5C%5C%22DISPLAY%3A%20none%5C%5C%5C%22%20type%3D%5C%5C%5C%22math%2Ftex%5C%5C%5C%22%3Ex%20%3D%5C%5C%5C%5Cfrac%7B-3%20%5C%5C%5C%5Cpm%20%5C%5C%5C%5Csqrt%7B7%7D%7D%7B-2%7D%3C%2FCODE%3E%5C%22%22%2C58%5D%2C%5B%22correct-activity%22%2C%22%5C%22%3CCODE%20style%3D%5C%5C%5C%22DISPLAY%3A%20none%5C%5C%5C%22%20type%3D%5C%5C%5C%22math%2Ftex%5C%5C%5C%22%3Ex%20%3D%5C%5C%5C%5Cfrac%7B1%20%5C%5C%5C%5Cpm%20%5C%5C%5C%5Csqrt%7B19%7D%7D%7B4%7D%3C%2FCODE%3E%5C%22%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C9%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22hint-activity%22%2C%220%22%2C15%5D%5D)

["x =\\frac{-3 \\pm \\sqrt{7}}{-2}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}","x =\\frac{1 \\pm \\sqrt{19}}{4}"]

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