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posted by Jessica Tuesday, June 7, 2011 at 11:19am.
Can (4x^3)y - 9xy^3 factor?
Take out the obvious common factor xy: (4x^3)y - 9xy^3 =xy(4x^2 - 9y^2) and factor as difference of two squares =xy((2x)²-(3y)²) =xy(2x+3y)(2x-3y)
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