题目内容
化简:
(1)2
•(3
-4
-3
);
(2)a
-2a2
+3
.
(1)2
| 12 |
| 48 |
|
| 27 |
(2)a
| 8a |
|
| 2a3 |
(1)原式=4
×(12
-
-9
)
=4
×(3
-
)
=36-4
;
(2)原式=2a
-2a2×
+3a
=2a
-
a
+3a
=
.
| 3 |
| 3 |
| 2 |
| 3 |
=4
| 3 |
| 3 |
| 2 |
=36-4
| 6 |
(2)原式=2a
| 2a |
| ||
| 4a |
| 2a |
=2a
| 2a |
| 1 |
| 2 |
| 2a |
| 2a |
=
| 9a |
| 2 |
| 2a |
练习册系列答案
相关题目