计算:(______)•3ab2=9ab5;-12a3bc÷(______)=4a2b;(4x2y-8x3)÷4x2=_
1个回答
(9ab
5
)÷(3ab
2
)=3b
3
;
(4a
2
b)÷(-12a
3
bc)=-3ac;
(4x
2
y-8x
3
)÷4x
2
=y-2x,
故应填3b
3
;-3ac;y-2x.
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