1. From the product of (x – 2y + 1)(x + y), subtract the product (x – InterviewSolution

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1. From the product of (x – 2y + 1)(x + y), subtract the product (x + y + 1)(x – 2y) andthen evaluate it for x = -2 and y = - 1.

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don't KNOW this SORRY for that....

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