x^2y--[-x^2y-(2XYZ-X^2Z-3x^2y)-4x^2z]-XYZ其中x=-3,y=2,z=-1x^2y--[-x^2y-(2XYZ-X^2Z-3x^2y)-4x^2z]-XYZ其中x=-3,y=2,z=-1

2x+3y+4z,xyz 正数XYZ满足(X+Y)(X+Z)=2则XYZ(X+Y+Z)最大值 x^3+x^2y-x^z-xyz分解因式 3x^2y-{xyz-（2xyz-x^2z）-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}化简 化简求值（2x^3-xyz)-2(x^3-y^3+xyz)+(xyz-2y^3)=? 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) 因式分解 (x+y+z)^2+yz(y+z)+xyz x+y+z+2=xyz,x,y,z.为正实数,证明：xyz(x-1)(y-1)(z-1) (x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z x²y-y²z+z²x-x²z+y²x+z²y-2xyz 先化简再求值3xyz+2(x^2y+y^2z-xyz)-xyz+2z^2x x=1 y= -1 z=2 (2x^3-xyz)-2(x^3-y^3+xyz)+(xyz-2y^3),其中x=-1,y=-2,z=-3. 化简求值：（2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³）,x=1,y=2,z=-3 先化简,再求值：3xyz+2(x²y+y²z-xyz)-xyz+2z²x,其中x=1、y=-1、z=2; (2x³-xyz）-2（x³-y³+xyz）+（xyz-3y³） x=1 y=-2 z=-3 x^2y--[-x^2y-(2XYZ-X^2Z-3x^2y)-4x^2z]-XYZ其中x=-3,y=2,z=-1x^2y--[-x^2y-(2XYZ-X^2Z-3x^2y)-4x^2z]-XYZ其中x=-3,y=2,z=-1 已知xyz适合关系式√3x+y-z-2+√2x+y-z=√x+y-2011+2011-x-y,试求xyz的值