分解 2x^3-4x^2y-x^2z+2xy^2+2xyz-y^2z求过程
已知方程组﹛x+4y-3z=0 4x-5y+2z=0 ,xyz≠0,求﹙3x²+2xy+z²﹚÷﹙x
已知三个数x,y,z,满足xy/x+y=-2,yz/y+z=4/3,zx/z+x=-4/3,求(xyz)/(xy+yz+
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
XYZ满足XY/X+Y=-2,YZ/Y+Z=3/4,ZX/Z+X=-4/3,求XYZ/XY+YZ+ZX的值
已知x/2=y/3=z/4,xyz≠0,求3x/2x+3y-5z的值.
已知2x-3y+z=o,3x-2y-6z=0,xyz≠0,求x^2+y^2+z^2/2x^2+y^2-z^2的值
已知xyz≠0,且x+3y+z=0,2x+3y-z=0 ,求x+2y-7z /3x+5y+z的值?
x:y:z=2:3:4且x+y+z=18求xyz
4x-5z=y-x+6z=x+y+z xyz≠0 求x∶y∶z的值结果是.5:3:2请问过程怎么写
3x-y+z=4 2x+3y-z=12 x+y+z=6 求xyz的值要过程
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值