题目内容
化简
•(
-2)的结果是______．
| x |
| x2-1 |
| x-1 |
| x |
原式=
•
=
•
=
．
故答案为：
．
| x |
| (x+1)(x-1) |
| x-1-2x |
| x |
=
| x |
| (x+1)(x-1) |
| -1-x |
| x |
=
| 1 |
| 1-x |
故答案为：
| 1 |
| 1-x |
练习册系列答案
相关题目
题目内容
| x |
| x2-1 |
| x-1 |
| x |
| x |
| (x+1)(x-1) |
| x-1-2x |
| x |
| x |
| (x+1)(x-1) |
| -1-x |
| x |
| 1 |
| 1-x |
| 1 |
| 1-x |