3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}化简
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3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}化简3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x
3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}化简
3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}
化简
3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^z-3xyz)]}化简
3x^2y-{xyz-(2xyz-x^2z)-4x^2z+[3x^2y-(4xyz-5x^2z-3xyz)]}
=3x^2y-[xyz-2xyz+x^2z-4x^2z+(3x^2y-4xyz+5x^2z+3xyz)]
=3x^2y-(xyz-2xyz+x^2z-4x^2z+3x^2y-4xyz+5x^2z+3xyz)
=3x^2y-xyz+2xyz-x^2z+4x^2z-3x^2y+4xyz-5x^2z-3xyz
=(3-3)x^2y+(-1+2+4-3)xyz+(-1+4-5)x^2z
=2xyz-2x^2z
=2xz(y-x)
2x+3y+4z,xyz
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)=?
xyz-【2xy-(3xyz-yz)+4xyz】,其中x=2,y=-1/2,z=-1
xyz-【2xy-(3xyz-yz)+4xyz】,其中x=2,y=-1/2,z=-1
x^3+x^2y-x^z-xyz分解因式
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.
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)
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;
正数XYZ满足(X+Y)(X+Z)=2则XYZ(X+Y+Z)最大值
约分:9xy^2+6xyz/3x^2y
化简3X^2y-{xyz-(2xyz-9x^2z+4x^2z)+[3x^2y+(4xyz-5x^2z-3xyz)]}等于( )A 2xyz-2x^2z B 6x^2y-4xyz+2x^2zC 6x^2y+2xyz-10x^2z D 8xyz+10x^2z
先化简,再求值:(2x3-xyz)-2(x3-y3+xyz)+(xyz-2y3),其中x=1,y=2,z=-3
已知xyz为正实数,且x+2y+z=2,求xyz最大值