题目内容
化简:-
-(
-
)=______.
| 3 |
| 2 |
| a |
| a |
| 3 |
| 2 |
| b |
原式=-
-
+
=-
+
.
故答案为:-
+
.
| 3 |
| 2 |
| a |
| a |
| 3 |
| 2 |
| b |
| 5 |
| 2 |
| a |
| 3 |
| 2 |
| b |
故答案为:-
| 5 |
| 2 |
| a |
| 3 |
| 2 |
| b |
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