化简：X＾2＋Y＾2－Z＾2＋2XY／X＾2－Y＾2＋Z＾2－2XZ＝＿＿＿尽快哦

化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(xy-2z)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z)速速回答 化简x^2-yz/[x^2-(y+z)x+yz]+y^2-zx/[y^2-(z+x)y+zx]+z^2-xy/[z^2-(x+y)z+xy] 2分之一(x+y+z)的平方＋2分之一（x-y-z)(x-y+z)-z(x+y),其中x-y=6,xy=21 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy 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) 设二元函数z=x＾2+xy+y＾2-x-y,x＾2+y＾2 化简：X＾2＋Y＾2－Z＾2＋2XY／X＾2－Y＾2＋Z＾2－2XZ＝＿＿＿尽快哦 分解　2x＾3－4x＾2y－x＾2z＋2xy＾2＋2xyz－y＾2z求过程 (2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ) 五羊杯竞赛题x^2+yz/x^2+(y-z)-yz ＋ y^2-zx/y^2+(z+x)y+zx ＋ z^2+xy/z^2-(x-y)z-xy折项再通分，最终化简 化简：5根号X＾3Y－2Y根号XY－6根号XY＋根号X分之Y＋根号Y分之X (xy-1)^2+(x+y-z)(x+y-zxy)因式分解 已知实数x、y、z满足x＋y=5,z的平方=xy+y-9,那么x+2y+3z=( ) (x^2+yz)/(x^2+x(y-z)-yz)+(y^2-xz)/(y^2+y(x+z)+zx)+(z^2+yx)/(x^2-z(x-y)-yx)最后一项应为：(z^2-xy)/(z^2+z(y-x)-xy) 24xy^2z^2(x+y+z)-32xyz(z-x-y)^2+8xyz^3(z-x-y) 24xy^2z^2(x+y+z)-32xyz(z-x-y)^2+8xyz^3(z-x-y) 设z=f(x^2-y^2,e^（xy)),求偏导z/x,偏导z/y 化简.x＾2-3xy／x＾2－6xy+9y＾2