3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz ,其中x=-2,y=-3,z=1
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3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz,其中x=-2,y=-3,z=13x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz,其中x=-2,y=-3,z
3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz ,其中x=-2,y=-3,z=1
3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz ,其中x=-2,y=-3,z=1
3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz ,其中x=-2,y=-3,z=1
原式=6xy-[4xy-(2xyz-2xz)-8xz]-xyz
=6xy-(4xy-2xyz+2xz-8xz)-xyz
=6xy-4xy+2xyz-2xz+8xz-xyz
=2xy+xyz+6xz
=x(2y+yz+6z)
当x=-2,y=-3,z=1时
原式=-2*[2*(-3)+(-3)*1+6*1]
=6
2x+3y+4z,xyz
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)
正数XYZ满足(X+Y)(X+Z)=2则XYZ(X+Y+Z)最大值
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
(2x³-xyz)-2(x³-y³+xyz)+(xyz-3y³) 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;
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
3x^2y-[2x^2y-(2xyz-x^2z)-4x^2z]-xyz ,其中x=-2,y=-3,z=1
X^2Y-[-X^2Y+(XYZ-X^2Z)+XYZ]-X^2Z,其中x=-1,y=-2,z=1/3
3x²y-[2x²y-(2xyz-x²z)-4x²z]-xyz,其中x=-2 y=-3 z=1
约分:9xy^2+6xyz/3x^2y