>
数学
>
(9x
3
y
4
-6x
4
y
3
+3x
2
y
3
)÷______=-3x
2
y
2
+2x
3
y-xy.
人气:147 ℃ 时间:2020-04-25 16:23:45
解答
观察可知,(9x
3
y
4
-6x
4
y
3
+3x
2
y
3
)÷(-3xy
2
)=-3x
2
y
2
+2x
3
y-xy.
故答案为(-3xy
2
).
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