y）是xy的话，那答案应该是：-x^3y^3+3x^2y^2-2xy；^的意思是前面的数字或者字母的后面的数字的次方，比如：2^3=2的三次方 谢谢采纳~
=8X十5
（x+y-2XY)(x+y-2)+(xy-1)^2 =[（x+y)-2xy][(x+y)-2]+(xy-1)^2 =(x+y)^2-2(xy+1)(x+y)+4xy+x^2y^2-2xy+1 =(x+y)^2-2(xy+1)(x+y)+x^2y^2+2xy+1 =(x+y)^2-2(xy+1)(x+y)+(xy+1)^2 =[(x+y)-(xy+1)]^2 =(x+y-xy-1)^2 =[x(1...
【解答】解:(x+y-2xy)(x+y-2)+(xy-1)2=(x+y)2-2xy(x+y)-2(x+y)+4xy+(xy)2-2xy+1=[(x+y)2-2xy(x+y)+(xy)2]-2(x+y-xy)+1=(x+y-xy)2-2(x+y-xy)+1=[(x+y-xy)-1]2=(-xy+x+y-1)2=[-x(y-1)+(y-1)]2=[(y-1)(1-x)]2=(x-1)2(y-1)2. 【分析...
解答：(x+y-2xy)(x+y-2)+(xy-1)^2 =(x+y)^2-2(xy+1)+4xy+(xy-1)^2 =(x+y)^2-2(xy+1)++(xy+1)^2 =(x+y+xy+1)^2 (x+1)^2(y+1)^2
（x＋y－2xy）（x＋y－2）＋（xy－1）²=（x+y)²-(2xy+2)(x+y)+4xy+x²y²-2xy+1 =（x+y)²-2(xy+1)(x+y)+(x²y²+2xy+1)=（x+y)²-2(xy+1)(x+y)+(xy+1)²=[(x+y)-(xy+1)]²=(x+y-xy-1)&#...
怎么求(y²-2xy)dx=(x²-2xy)dy的通解 我来答 1个回答 #热议# 为什么孔子像会雕刻在美最高法院的门楣之上?闻书雁 2021-01-10 · 超过74用户采纳过TA的回答 知道答主 回答量:135 采纳率:100% 帮助的人:38.2万 我也去答题访问个人页 关注 展开全部 已赞过 已踩过< 你对这个回答...
(a-2b)(a-2)+(b-1)^2 =a^2-2ab-2a+4b+b^2-2b+1 =a^2-2ab-2a+b^2+2b+1 =a^2-2ab+b^2-2a+2b+1 =(a-b)^2-2(a-b)+1 =(a-b-1)^2
简单计算一下即可，答案如图所示
https://www.tiger-algebra.com/drill/3x~3y-6x~2y~2-3xy~3/ 3x3y-6x2y2-3xy3 Final result : 3xy • (x2 - 2xy - y2) Step by step solution : Step 1 :Equation at the end of step 1 : (((3•(x3))•y)-((6•(x2))•(y2)))-3xy3 Step 2 :Equation...