展开全部
(x^2 -y^2)/(xy) - (xy-y^2)/(xy-x^2)
=(x^2-y^2)/(xy) - y(x-y)/[x(y-x)]
=(x^2-y^2)/(xy) + y/x
=(x^2-y^2)/(xy) + y^2/(xy)
=x^2/(xy)
=x/y
=(x^2-y^2)/(xy) - y(x-y)/[x(y-x)]
=(x^2-y^2)/(xy) + y/x
=(x^2-y^2)/(xy) + y^2/(xy)
=x^2/(xy)
=x/y
本回答由提问者推荐
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
