题目内容
| x |
| x+3 |
| 6 |
| x2-9 |
| 2 |
| x-3 |
原式=
-
×
=
-
=
.
故答案为
.
| x |
| x+3 |
| 6 |
| (x+3)(x-3) |
| x-3 |
| 2 |
=
| x |
| x+3 |
| 3 |
| x+3 |
=
| x-3 |
| x+3 |
故答案为
| x-3 |
| x+3 |
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题目内容
| x |
| x+3 |
| 6 |
| x2-9 |
| 2 |
| x-3 |
| x |
| x+3 |
| 6 |
| (x+3)(x-3) |
| x-3 |
| 2 |
| x |
| x+3 |
| 3 |
| x+3 |
| x-3 |
| x+3 |
| x-3 |
| x+3 |