题目内容
不改变分式的值,使分子,分母都不含负号:
=______;
=______;-
=______;
=______.
| -z |
| -yz |
| -2 |
| 3x |
| -2 |
| -ab |
| -5-y |
| -x |
| -z |
| -yz |
| z |
| yz |
| -2 |
| 3x |
| 2 |
| 3x |
| -2 |
| -ab |
| 2 |
| ab |
| -5-y |
| -x |
| 5+y |
| x |
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题目内容
| -z |
| -yz |
| -2 |
| 3x |
| -2 |
| -ab |
| -5-y |
| -x |
| -z |
| -yz |
| z |
| yz |
| -2 |
| 3x |
| 2 |
| 3x |
| -2 |
| -ab |
| 2 |
| ab |
| -5-y |
| -x |
| 5+y |
| x |