Question

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Factorize a-b-a²+b²

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Answer 1

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a-b-a²+b²

=(a-b)-(a²-b²)

=(a-b)-(a-b)(a+b)

=(a-b) [1-(a+b)

Answer 2

=(a-b)-(a²-b²)

=(a-b)-(a-b)(a+b)

=(a-b) [1-(a+b)

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