3x(x-1)-2(1-x)=3x(x-1)+2(x-1)=(x-1)(3x+2) 不懂可追问满意请采纳谢谢
解:原式=3x(x-1) 2(x-1)=(3x 2)(x-1)
3x平方-x-2=(3x+2)(x-1)
=(3x+2)(x-1)