x^2-y^2-z^2-2yz

因式分解 (x+y+z)^2+yz(y+z)+xyz (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) 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] 求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ) 因式分解x^2-y^2-z^2+2yz x^2-y^2-z^2-2yz因式分解如题快 分解因式：x^2-y^2+2yz-z^2 x^2-y^2-z^2-2yz x^2-y^2-z+2yz 因式分解 因式分解：x²-y²-z²+2yz 因式分解4x²-y²-2yz+z² 因式分解x²-y²-z²+2yz 因式分解x²-y²-z²+2yz 因式分解练习题,x²-y²-z²-2yz 分解因式2yz-y²-z²+x² 分解因式:x²-y²-z²+2yz 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)