已知x^2+y^2+2z^2-2x+4y+4z+7=0,则xyz=?
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4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知有理数x,y,z满足条件:|x-z-2|+|3x-6y-7|+(3y+3z-4)^2=0,则xyz=?
已知有理数x,y,z满足(x-z-2)²+(3x-6y-7)+|3y+3z-4|=0,则xyz=
已知有理数x,y,z满足条件;|x-y-2|+|3x-6y-7|+(3y+3z-4)的平方=0则xyz=___?
已知有理数x.y.z满足(x-z-2)^2+(3x-6y-7)^2=/3y+3z-4/=0求xyz=多少
已知x+4y-3z=0,4x-5y+2z=0(xyz不等于0),则x:y:z=?
已知2x-4y-5z=0,-3x+y+4z=0 (xyz≠0)则x/y/z=?
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
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
已知一方程组:x-3y+7z=0与x-2y+4z=0(xyz≠0),求x:y:z.