Khan/khan-exercises — Issue #12799: Factoring difference of squares 2 - Factoring difference of squares 2
Author: KhanBugz
Created: 2012-02-01 14:25:10+00:00
State: open

Some of these problems should probably have a constant factored out, but this is not accepted as an answer.

For example: 9(x^2) - 81 should probably be 9(x-3)(x+3), but instead only (3x-9)(3x+9) is allowed.

[factoring_difference_of_squares_2.html?seed=32&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/factoring_difference_of_squares_2.html?seed=32&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/factoring_difference_of_squares_2.html?seed=32&problem=0&debug&activity=%5B%5D)

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