(9x3y4-6x4y3+3x2y3)÷_=-3x2y2+2x3y-xy.

问题描述:

(9x3y4-6x4y3+3x2y3)÷______=-3x2y2+2x3y-xy.

观察可知,(9x3y4-6x4y3+3x2y3)÷(-3xy2)=-3x2y2+2x3y-xy.
故答案为(-3xy2).