通分:x^3/x-1-x^2-x
问题描述:
通分:x^3/x-1-x^2-x
答
原式=x³/(x-1)-(x²+x)
=[x³-(x²+x)(x-1)]/(x-1)
=(x³-x³+x)/(x-1)
=x/(x-1)