题目内容
(7-5
)2009•(7+5
)2010=______.
| 2 |
| 2 |
由题意知,(7-5
)2009•(7+5
)2010
=(7-5
)2009•(7+5
)2009•(7+5
)
=(-1)2009•(7+5
)=-7-5
,
故本题的答案为-7-5
.
| 2 |
| 2 |
=(7-5
| 2 |
| 2 |
| 2 |
=(-1)2009•(7+5
| 2 |
| 2 |
故本题的答案为-7-5
| 2 |
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