题目内容
化简:
(1)
+3
-
-
;
(2)a
-2a2
+3
.
(1)
20 |
1
|
5 |
4 |
7
|
2 |
3 |
48 |
(2)a
8a |
|
2a3 |
(1)原式=2
+3×
-
×
-
×4
=2
+2
-
=
-
;
(2)原式=2a
-
+3a
=
.
5 |
2
| ||
3 |
5 |
4 |
6
| ||
5 |
2 |
3 |
3 |
5 |
3 |
3
| ||
2 |
8
| ||
3 |
| ||
2 |
2
| ||
3 |
(2)原式=2a
2a |
a
| ||
2 |
2a |
9a
| ||
2 |
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