(x-6)(x2+x+1)-x(2x+1)(3x-1)
问题描述:
(x-6)(x2+x+1)-x(2x+1)(3x-1)
答
原式=x3+x2+x-6x2-6x-6-(2x2+x)(3x-1)
=x3+x2+x-6x2-6x-6-(6x3-2x2+3x2-x)
=x3+x2+x-6x2-6x-6-6x3+2x2-3x2+x
=-5x3-6x2-4x-6.