(-3/2xy)(-x²z)(5xy²)
(-3/2xy)(-x²z)(5xy²)
已知xyz满足|x-2|+(3y-1)+(z-2)²=0,则(-3xy)*(-x²z)*6xy=
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
化简(3X²-XY+Y²)-5(X²-XY+2Y²)
x+y=-10,xy方=-81,求3[-(x+y)+2xy方-z]-2[(x+y)-xy方+z]-5[-3(x+y)-z
已知1x-11+(y-2)²+√z+3=0,求xy+√z²的值
已知√x-3+|y-1|+(z+2)²=0,求2xy+z的平方根
化简求值 已知:(x+2)2;+|y+1|=0求5xy²-{2xy²-[3xy²(4xy&
化简求值:【4(xy-1)²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
1、xy²+2xy-x(因式分解)
设z=xln(xy)求∂3z/∂x²∂y及∂3z/∂