题目内容
计算
÷
的结果为______.
| a-1 |
| a2-4a+4 |
| a2-1 |
| a2-4 |
原式=
•
=
.
| a-1 |
| (a-2)2 |
| (a+2)(a-2) |
| (a+1)(a-1) |
| (a+2) |
| (a-2)(a+1) |
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题目内容
| a-1 |
| a2-4a+4 |
| a2-1 |
| a2-4 |
| a-1 |
| (a-2)2 |
| (a+2)(a-2) |
| (a+1)(a-1) |
| (a+2) |
| (a-2)(a+1) |