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posted by Melissa on Sunday, October 2, 2011 at 11:20pm.
i tried these quesions so many times , but i just cant get he right answer ! 1.) 4(2-a)^2-81 2.) -(x-y)^3 3.)3x^2-27(2-x)^2 4.) 9(y-1)^2-25
shut up
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