题目内容
计算:
(1)
+
+
-
(2)
m
+6m
-2m2
.
(1)
| 8 |
| 12 |
| 2 |
| 3 |
(2)
| 1 |
| 2 |
| 4m |
|
|
(1)原式=2
+2
+
-
=3
+
;
(2)原式=m
+2m
-2m
=m
.
| 2 |
| 3 |
| 2 |
| 3 |
=3
| 2 |
| 3 |
(2)原式=m
| m |
| m |
| m |
=m
| m |
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题目内容
| 8 |
| 12 |
| 2 |
| 3 |
| 1 |
| 2 |
| 4m |
|
|
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| m |
| m |
| m |
| m |