Question

(x-2)(x + 1) = (x - 1) (x + 3).
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Answer 1

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$(x - 2)(x + 1) = (x - 1)(x + 3) \\ \\ x(x + 1) - 2(x + 1) = x(x + 3) - 1(x + 3) \\ \\ {x}^{2} + x - 2x - 2 = {x}^{2} + 3x - x - 3 \\ \\ x + x - 2x - 3x - 2 + 3 \\ \\ = > - 3x + 1$

Answer 2

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