(1)(x²-x)(x²-1)-2x²+2
问题描述:
(1)(x²-x)(x²-1)-2x²+2
(2)x^3-7x+6
答
(1)(x²-x)(x²-1)-2x²+2=(x²-x)(x²-1)-2(x²-1)= (x²-x-2)(x²-1)=(x-2)(x+1)(x+1)(x-1)=(x-1)(x-2)(x+1)²(2)x^3-7x+6=x³-x-6x+6=x(x²-1)-6(x-1)=...