x^2=y^2(xy^42y^2)

x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?x*x+xy=3,xy+y*y=2,则x

f(xy,x-y)=x^2+y^2+xy;f(x,y)/∂x;f(x,y)/∂yf(xy,x-y)=x^2+y^2+xy;f(x,y)/∂x;f(x,y)/W

(-x-y)(x^2+xy+y^2)(-x-y)(x^2+xy+y^2)(-x-y)(x^2+xy+y^2)原式=-x3-2x2y-2xy2-y3楼上的,注意审题,不要乱套公式.原式=-x^3-y^3

化简x^-y^/x^-2xy+y^化简x^-y^/x^-2xy+y^化简x^-y^/x^-2xy+y^(x²-y²)/(x²-2xy+y²)=[(x+y)(x-

2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)=-2xy（x-y）³请问我温热鹅鹅鹅饿呃呃呃呃呃呃呃呃呃

已知X+Y=17,XY=42,求X^2y+xy^2的值已知X+Y=17,XY=42,求X^2y+xy^2的值已知X+Y=17,XY=42,求X^2y+xy^2的值X^2y+xy^2=xy(x+y)=4

若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y不好意思，是3x-2xy-3y/x-2xy-y若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3

（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算【x²+xy/（x-y）】/【xy/（x-y）】=【

x^2+xy+x=36,y^2+xy+y=20,求x+y.x^2+xy+x=36,y^2+xy+y=20,求x+y.x^2+xy+x=36,y^2+xy+y=20,求x+y.7或者-8∵x²

若x^2+xy+y=14,y^2+xy+x=28,求x+y若x^2+xy+y=14,y^2+xy+x=28,求x+y若x^2+xy+y=14,y^2+xy+x=28,求x+y两式相加有x²+

函数f(xy,x+y)=x^2+xy+y^2,则df(x,y)=?函数f(xy,x+y)=x^2+xy+y^2,则df(x,y)=?函数f(xy,x+y)=x^2+xy+y^2,则df(x,y)=?因

f(xy,x-y)=x^2+3xy+y^2,则f(x,y)=?f(xy,x-y)=x^2+3xy+y^2,则f(x,y)=?f(xy,x-y)=x^2+3xy+y^2,则f(x,y)=?f(xy,x-

如果x^2+xy+y-14,y^@+xy+x=28,求x+y的值.如果x^2+xy+y-14,y^@+xy+x=28,求x+y的值.如果x^2+xy+y-14,y^@+xy+x=28,求x+y的值.x

f(xy,x-y)=x^2-xy+y^2.求f(x,y)f(xy,x-y)=x^2-xy+y^2.求f(x,y)f(xy,x-y)=x^2-xy+y^2.求f(x,y)原始化简为（X-Y）-3XY所以

X²+2xy+y²/xy乘x²-2xy+y²/xy+y²=X²+2xy+y²/xy乘x²-2xy+y²/xy+

(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10(x+y)^2/y^2-xy÷[

已知x*x-4xy+4y*y=0求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?已知x*x-4xy+4y*y=0求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的

(-x+2y)(2x+y)-(2x+y)(y-2x)-3xy=?因式分解(-x+2y)(2x+y)-(2x+y)(y-2x)-3xy=?因式分解(-x+2y)(2x+y)-(2x+y)(y-2x)-3

f(x+y,x-y)=(x^2-y^2)/2xy,求f(x,y)!f(x+y,x-y)=(x^2-y^2)/2xy,求f(x,y)!f(x+y,x-y)=(x^2-y^2)/2xy,求f(x,y)!1

[-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算[-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算[-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算原式=(