已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/15 17:24:50
已知x^-XY=60,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~已知x^-XY=60,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~已知x^-XY=60,X
已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
X^-Y^=60+40=100
2X^-5XY+3Y^
=2(x^-xy)-3(xy-y^)
=2*60-3*40
=0
X^-Y^=x^-xy+xy-y^=60+40=100;
2X^-5XY+3Y^=2(x^-xy)-3(xy-y^)=2*60-3*40=120-120=0;
已知x*x-xy=60,xy-y*y=40,问x*x-2xy+y*y的值(要过程）
已知:x-xy=40,xy-y=-20,求代数式x-y和x+y-2xy的值.
已知x^2-xy=60´xy-y^2=40,求代数式x^2-y^2和x^2.-2xy+y^2的值
已知x^2-xy=60´xy-y^2=40,求代数式x^2-y^2和x^2.-2xy+y^2的
已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
已知x^-XY=60 ,XY-Y^=40,求代数式X^-Y^和2X^-5XY+3Y^的值~
已知x²-xy=60,xy-y²=40,求代数式x²-y²和x²-2xy+y²的值.
|x|/x+y/|y|+xy/|xy|=
已知x+y=1,xy=-2,则x²y+xy²-2xy
已知x-xy=8,xy-y=-9,求x+y-2xy的值
已知xy>0,证明xy+xy/1+x/y+y/x>=4
由已知x+y=-2,xy=3那么2(x+xy)-[(xy-3y)-x]-(-xy)等于多少?
已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值.
已知xy^2=-2 求-xy(x^2y^5-xy^3-y)
已知xy^2=-2xy(x^2y^5-xy^3-y)
已知x+y=12,xy=9,求(x+3xy+y)/(xy+xy)的值
已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2
已知x^-xy=5,xy-y^=-3,求式子3(x^-xy)-xy+y^的值