题目内容
计算:(
-
)÷
.
| x |
| x-3 |
| x |
| x+3 |
| 6x |
| 3-x |
原式=
×
=
×(-
)
=-
.
故答案为-
.
| x2+3x-x2+3x |
| (x-3)(x+3) |
| 3-x |
| 6x |
=
| 6x |
| (x-3)(x+3) |
| x-3 |
| 6x |
=-
| 1 |
| x+3 |
故答案为-
| 1 |
| x+3 |
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