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April 24, 2014

Homework Help: math

Posted by Natalie on Monday, July 25, 2011 at 3:55pm.

Use the “difference of squares” rule to factor the following expression
49-4y^2
my answer is going to be (7-2y)(7-2y)
I wasnt sure if it could of been (7-2y)(7+2y)

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