化简:(x-1)(2x^2-3x+2)-x(x+1)(x-2)

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化简:(x-1)(2x^2-3x+2)-x(x+1)(x-2)
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化简:(x-1)(2x^2-3x+2)-x(x+1)(x-2)
化简:(x-1)(2x^2-3x+2)-x(x+1)(x-2)

化简:(x-1)(2x^2-3x+2)-x(x+1)(x-2)
原式=2x³-3x²+2x-2x²+3x-2-x(x²-x-2)
=2x³-5x²+5x-2-x³+x²+2x
=x³-4x²+7x-2

  (x-1)(2x^2-3x+2)-x(x+1)(x-2)
  =2x³-3x²+2x-2x²+3x-2-x³+2x²-x²+2x
  =x³-4x²+7x-2