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posted by John Thursday, January 10, 2013 at 11:08pm.

Factor pls show me steps thank u! (X-1)(x+2)^2-(x-1)^2(x+2)

= (x-1)(x+2) [ (x+2) - (x-1) ] = (x-1)(x+2)(x+2-x+1) = 3(x-1)(x+2)

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