Toán Lớp 8: (x-1)mũ 3 - 4x nhân (x-1)(x+1)+3(x-1)(x mũ 2 +x+1) -

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Toán Lớp 8: (x-1)mũ 3 – 4x nhân (x-1)(x+1)+3(x-1)(x mũ 2 +x+1)