题目内容
计算
(1)
+
-
(2)(2
-
)(2
+
).
(1)
| 3 |
| 27 |
| 12 |
(2)(2
| 3 |
| 2 |
| 3 |
| 2 |
(1)原式=
+3
-2
=2
;
(2)原式=(2
)2-(
)2
=12-2
=10.
| 3 |
| 3 |
| 3 |
=2
| 3 |
(2)原式=(2
| 3 |
| 2 |
=12-2
=10.
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题目内容
| 3 |
| 27 |
| 12 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 3 |
| 3 |
| 3 |
| 2 |