约分:1-x^2分之2x-2
问题描述:
约分:1-x^2分之2x-2
答
原式=-2(x-1)/(x+1)(x-1)
=-2/(x+1)
约分:1-x^2分之2x-2
原式=-2(x-1)/(x+1)(x-1)
=-2/(x+1)