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Phân tích thành nhân tử: A, x^3-4x^2+12x-27 B, x^2-2x-4y^2-4y C, x^4+2x^3-4x-4 D, ab(a+b)-bc(b+c)+ac(a-c) GIÚP GẤP VỚI MNG ƠI🥲
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