化简(x-1)分之(x²-2x)÷【(x+1)分之(2x-1)-x+1】
问题描述:
化简(x-1)分之(x²-2x)÷【(x+1)分之(2x-1)-x+1】
答
原式=x(x-2)/(x-1)÷[(2x-1+1-x^)/(x+1)]
=x(x-2)/(x-1)×(x+1)/[-x(x-2)]
=-(x+1)/(x-1).