x^3+x^2y-xy^2-xz^2+yz^2-y^3

(2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ) 化简(2x-y-z/x^2-xy-xz+yz)+(2y-x-z/y^2-xy-yz+xz)+(2x-x-y/z^2-xz-yz+xy) 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy 求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ) 分解因式x^3+x^2y-xy^2-xz^2+yz^2-y^3快 x^3+x^2y-xy^2-xz^2+yz^2-y^3 X²-2xy-xz+yz+y²因式分解 xz-yz-x方+2xy-y方 因式分解 分式题:xy=x+y,yz=2(y+z),zx=3(z+x),求xyz/(xy+yz+xz)xy=x+y,yz=2(y+z),zx=3(z+x),求xyz/(xy+yz+xz) 已知xy(x+y)^-1=1,yz(y+z)^-1=2,xz(z+x)^-1=3,试求xyz(xy+yz+xz)^-1的值 已知xy(x+y)^-1=1,yz(y+z)^-1=2,xz(z+x)^-1=3,试求xyz(xy+yz+xz)^-1的值 已知xy(x+y)^-1=1,yz(y+z)^-1=2,xz(z+x)^-1=3 求zyx(zy+xz+xy)^-1=? x^2-y^2/x^2-(y-z)^2/x^2+2xy+y^2/(x-y)^2-x^2*x^2+xy-xz/x^2-xy (x^2-y^2)/[x^2-(y-z)^2]/[x^2+2xy+y^2]/[(x-y)^2-z^2]*[x^2+xy-xz]/[x^2-xy]= x^2-y^2/x^2-(y-z)^2/x^2+2xy+y^2/(x-y)^2-x^2*x62+xy-xz/x^2-xy x²-y²/x²-(y-z)²÷x²+2xy+y²/(x-y)²-z²×x²+xy-xz/x²-xy xy/x+y=1,xz/x+z=2,yz/y+z=3,求x的值 如果1=xy/x+y,2=yz/y+z,3=xz/x+z,则x的值?