展开全部
=(x²-y²)/xy × x/(x-y)=(x+y)/y
本回答被提问者采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
x÷(x-y)-x÷(x+y)
=x(x+y)/(x-y)(x+y)-x(x-y)/(x+y)(x-y)
=(x²+xy)/(x+y)(x-y)-(x²-xy)/(x+y)(x-y)
=(x²+xy-x²+xy)/(x+y)(x-y)
=2xy/(x²-y²)
=x(x+y)/(x-y)(x+y)-x(x-y)/(x+y)(x-y)
=(x²+xy)/(x+y)(x-y)-(x²-xy)/(x+y)(x-y)
=(x²+xy-x²+xy)/(x+y)(x-y)
=2xy/(x²-y²)
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