题目内容
计算:(
ab2-2ab)•
•
ab=______.
| 2 |
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| 1 |
| 2ab |
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| 2 |
(
ab2-2ab)×
ab
=
ab2×
ab-2ab×
ab
=
a2b3-a2b2.
故答案为:
a2b3-a2b2.
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| 3 |
| 1 |
| 2 |
=
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
=
| 1 |
| 3 |
故答案为:
| 1 |
| 3 |
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