题目内容
计算:
(1)(2
-3
)2+(2+
)(2-
)
(2)2
(3
-4
)-2(
-3
).
(1)(2
| 3 |
| 2 |
| 3 |
| 3 |
(2)2
| 12 |
| 48 |
|
|
| 27 |
(1)原式=12+18-12
+4-3
=31-12
;
(2)原式=4
(12
-
)-2(
-9
)
=144-4
-
+18
.
| 6 |
=31-12
| 6 |
(2)原式=4
| 3 |
| 3 |
| 2 |
| ||
| 4 |
| 3 |
=144-4
| 6 |
| ||
| 2 |
| 3 |
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