-2(-3xy+2z)+3(-2xy-5x)=?
(-3/2xy)(-x²z)(5xy²)
x+y=-10,xy方=-81,求3[-(x+y)+2xy方-z]-2[(x+y)-xy方+z]-5[-3(x+y)-z
5yz/(y+z)=6,4xy/(z+x)=3,3xy/x+y=2
以知X+Y=-10,XY的平方=-81,求3(-(X+Y)+2XY的平方-z)-2(X+Y-XY的平方+z)-5(-3(
1.x-z/xy - 2ab/xy
已知xyz满足|x-2|+(3y-1)+(z-2)²=0,则(-3xy)*(-x²z)*6xy=
已知X:Y:Z等于3:4:5,求2XY-3XY+Z的平方除以X平方减2XY减Z平方
-2(-3xy+2z)+3(-2xy-5x)先去括号,在合并同类项
计算:3xy[2xy-x(y-2)+x]
化简:xy分之3x^2+2xy-xy分之2x^2-xy=
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
已知√x-3+|y-1|+(z+2)²=0,求2xy+z的平方根