求解啊这题
2个回答
2017-03-15
展开全部
(x+1)/(x-1)-4x/(x²-1)
=(x+1)²/(x²-1)-4x/(x²-1)
=(x²+2x+1-4x)/(x²-1)
=(x-1)²/(x²-1)
=(x-1)/(x+1)
=(x+1)²/(x²-1)-4x/(x²-1)
=(x²+2x+1-4x)/(x²-1)
=(x-1)²/(x²-1)
=(x-1)/(x+1)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询