Khan/khan-exercises — Issue #15105: Solving quadratics by factoring 2 - Too big hint about perfect squares
Author: KhanBugz
Created: 2012-03-01 13:37:16+00:00
State: open
Labels: other, win7

Whenever an expression in the exercise is a perfect square, there is only one value for X, which is releflected in the answer, where there is only one input field.

Hence, by look at at the answer box, if there is one X, the expression can be factored as a perfect square, if there are two X's, it needs to be factored normally.

This kind of allows for cheating, voluntary or not.

[solving_quadratics_by_factoring_2.html?seed=52&problem=one-root](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_quadratics_by_factoring_2.html?seed=52&problem=one-root&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/solving_quadratics_by_factoring_2.html?seed=52&problem=one-root&debug&activity=%5B%5D)

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Opera/9.80 (Windows NT 6.1; U; en) Presto/2.10.229 Version/11.61

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