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4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z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
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值
已知xyz满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
已知方程组{2X-Y+3Z=0,X-3Y+Z=0(XYZ≠0),求3Y分之4X+2Z的值
已知有理数x,y,z满足(x-z-2)^2+(3x-6y-7)^2+|3y+3z-4|=0求xyz的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知x+y+z=0,求多项式x^3+x^2z-xyz+y^3的值