题目内容
计算(x4y+6x3y2-x2y3)÷3x2y得
A.x2+2xy-y2
B.x2+2xy-y2
C.x2+2xy-y2
D.x2+2xy-y2
(x4y十6x3y2-x2y3)÷3x2y等于
A.x2+2xy+y2
B.x2+2xy-y
D.x2十2xy-y2