题目内容
计算
(1)
-
+2
;
(2)(2
-3
)2+(2+
)(2-
)
(1)
| 2 |
| 8 |
| 72 |
(2)(2
| 3 |
| 2 |
| 3 |
| 3 |
(1)
-
+2
=
-2
+12
=11
;
(2)(2
-3
)2+(2+
)(2-
)
=12-12
+18+4-3
=31-12
.
| 2 |
| 8 |
| 72 |
=
| 2 |
| 2 |
| 2 |
=11
| 2 |
(2)(2
| 3 |
| 2 |
| 3 |
| 3 |
=12-12
| 6 |
=31-12
| 6 |
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