题目内容
化简：
=______，
=______．
| -14a2bc3 |
| 21a3bc |
| 9-m2 |
| m+3 |
| -14a2bc3 |
| 21a3bc |
| -2c2 |
| 3a |
| 2c2 |
| 3a |
| 9-m2 |
| m+3 |
| (3+m)(3-m) |
| m+3 |
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| -14a2bc3 |
| 21a3bc |
| 9-m2 |
| m+3 |
| -14a2bc3 |
| 21a3bc |
| -2c2 |
| 3a |
| 2c2 |
| 3a |
| 9-m2 |
| m+3 |
| (3+m)(3-m) |
| m+3 |
阅读快车系列答案