3(xy+2z)+(-xy+3z) 怎样做

3(xy+2z)+(-xy+3z) 怎样做 3(xy-2z)+(-xy+2z)怎样化简 3(xy-z)^2-(2xy+z)(-z+2xy) 计算-xy-(4z-2xy)-(3xy-4z) -xy(4z-2xy)-(3xy-4z) 化简 3(xy-2z)+(-xy+32)； 3(xy-2z)-2(-xy+3z) 3(xy-2z)+(-xy+3z)化简 3(xy-2z)+(-xy+3z)怎么算 3(xy—2z)+(—xy+3z)简化 3（xy-2z）+（-xy+3z）等于多少? 3[xy-2z] [-xy 3z] 的化简比是什么? 3（xy-2z）+（-xy+3z）化简式子 化简下列式 3（xy-2z）+(-xy+3z) 因式分解 -64x^2y^2z-32xy^3z+48xy^2z^2因式分解-64x^2y^2z-32xy^3z+48xy^2z^2 24xy^2z^2(x+y+z)-32xyz(z-x-y)^2+8xyz^3(z-x-y) 24xy^2z^2(x+y+z)-32xyz(z-x-y)^2+8xyz^3(z-x-y) 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