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