化简(x^2-2x+1)/(x^2+1)÷(x-1)/(x^2+x)-x
问题描述:
化简(x^2-2x+1)/(x^2+1)÷(x-1)/(x^2+x)-x
答
你是不是搞错了一个符号(x^2-2x+1)/(x^2 - 1)÷(x-1)/(x^2+x)-x=(x-1)²/(x+1)(x-1)×x(x+1)/(x-1)-x=x-x=0(x^2-2x+1)/(x^2+1)÷(x-1)/(x^2+x)-x=(x-1)²/(x²+1) ×x(x+1)/(x-1) -x=x(x+1)(x-1)/(x...