(x-6)(x²+x+1)-x(2x+1)(3x-1)
=(x³+x²+x-6x²-6x-6)-x(6x²-2x+3x-1)
=(x³-5x²-5x-6)-x(6x²+x-1)
=x³-5x²-5x-6-6x³-x²+x
=-5x³-6x²-4x-6
为梦想而生团队为你服务,希望对你有帮助,满意请及时采纳,不懂可追问!