题目内容
计算
(1)
+15
+8
-
(2)(2-
)2005(2+
)2006.
(1)
| 108 |
|
|
| 32 |
(2)(2-
| 5 |
| 5 |
(1)原式=6
+3
+4
-4
=9
;
(2)原式=(2-
)2005•(2+
)2005•(2+
)
=[(2-
)•(2+
)]2005•(2+
)
=2+
.
| 3 |
| 3 |
| 2 |
| 2 |
=9
| 3 |
(2)原式=(2-
| 5 |
| 5 |
| 5 |
=[(2-
| 5 |
| 5 |
| 5 |
=2+
| 5 |
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