(-2xy²z)²·(-3x²y²)³
X²-4X+Y²+6Y+(√Z+2)+13=0 求(xy)
若x-y=6,xy=-8,求代数式(x+y+z)²+(x-y-z)(x-y+z)-2·z(x+y)的值
已知实数x、y、z满足(x²-6xy+10y²+4y)y²+4y+|(z-3/2)
如果2x=y+z 3x+2y-12z=0且z≠0,求(2z²+3xy+y²)/(y²+z&
(x²+y²-z²+2xy)/(x²-y²+z²-2xz)计
已知x/3=y/4=z/6,求(xy+yz+xz)/(x²+y²+z²)
-2x²y(3xy²z-2y²z)
比如:-64x²y²z-32xy³z+48xy²z²,还有::-64x
-2x²y(3xy²z-2y平方z)
已知xyz满足|x-2|+(3y-1)+(z-2)²=0,则(-3xy)*(-x²z)*6xy=
正整数x、y、z满足x&3-y&3-z&3=3xyz,x²=0(y+z),则xy+yz+xz=()
已知1x-11+(y-2)²+√z+3=0,求xy+√z²的值