{(x-y/x^2-2xy+y^2)-(xy+y^2/x^2-y^2)}*(xy/y-1) 1个回答 #热议# 海关有哪些禁运商品?查到后怎么办? 天汉颂歌 2011-03-22 · TA获得超过4125个赞 知道小有建树答主 回答量:1193 采纳率:92% 帮助的人:379万 我也去答题访问个人页 关注 展开全部 原式={1/(x-y)-y/(x-y)}*xy/(y-1)=[(1-y)/(x-y)][xy/(y-1)]=-xy/(x-y). 本回答由提问者推荐 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 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 其他类似问题 2023-02-22 2x²(x-y)+2(y-x) 2023-05-12 (-2x+y)²-2(2x-y)(y+2x)-(x-y)(x+2y) 2022-05-13 (xy-x^2) • xy/x^2-2xy+y^2 ÷ x^2/x-y (xy-x^2) • xy/x^2-2xy+y^2 ÷ x^2/x-y 2013-03-15 (2x-y)²-4(x-y)(x+2y) 12 2018-01-01 2(x+y)(x-y)-(x+y)²-(x-y)² 等于多少 9 2020-02-12 (x -y )2・(y -x ) 2(x -y )・(x -y ) 2013-03-24 2(x-y)²-x(y-x) 1 2011-06-07 2(x-y)-x2+2xy-y2-1=0 2(x-y)-(x²-2xy+y²)-1=0 (x-y)²-2(x-y)+1=0 3 为你推荐: