证明:(x3+5x2+4x-1)-(-x2-3x+2x3-3)+(8-7x-6x2+x3)的值与x无关.

问题描述:

证明:(x3+5x2+4x-1)-(-x2-3x+2x3-3)+(8-7x-6x2+x3)的值与x无关.

原式=x3+5x2+4x-1+x2+3x-2x3+3+8-7x-6x2+x3=10,
故与x无关.