Tìm x: \((3x-1)^3 - 2(x+2)^2 = (3x+1)^2 - 3(2x-1)^2 - x(4+1)\)

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2) Tìm x: \((3x-1)^3 - 2(x+2)^2 = (3x+1)^2 - 3(2x-1)^2 - x(4+1)\)