题目内容
先化简，再求值：
÷(
-x-2)，其中x=
-3．
| 3-x |
| 2x-4 |
| 5 |
| x-2 |
| 3 |
| 3-x |
| 2x-4 |
| 5 |
| x-2 |
=
| 3-x |
| 2x-4 |
| 5 |
| x-2 |
| (x-2)(x+2) |
| x-2 |
=
| 3-x |
| 2x-4 |
| 5-(x2-4) |
| x-2 |
=
| 3-x |
| 2(x-2) |
| x-2 |
| (3-x)(3+x) |
=
| 1 |
| 2(x+3) |
当x=
| 3 |
| 1 | ||
2
|
| ||
| 6 |
练习册系列答案
目标测试系列答案
相关题目
=
=
=
=
当x=
目标测试系列答案