题目内容
当
=2时,代数式(
)2-
+4的值是______.
| a+1 |
| b |
| a+1 |
| b |
| 3b |
| a+1 |
由题意得:
=
将
和
整体代入代数式可变为:22-
+4=
.
| b |
| a+1 |
| 1 |
| 2 |
将
| a+1 |
| b |
| b |
| a+1 |
| 3 |
| 2 |
| 13 |
| 2 |
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题目内容
| a+1 |
| b |
| a+1 |
| b |
| 3b |
| a+1 |
| b |
| a+1 |
| 1 |
| 2 |
| a+1 |
| b |
| b |
| a+1 |
| 3 |
| 2 |
| 13 |
| 2 |