题目内容
计算:(
-
)•
=______.
| 1 |
| x-2 |
| 1 |
| x+2 |
| x2-4 |
| x |
原式=
•
=
•
=
.
故答案为:
.
| x+2-x+2 |
| (x+2)(x-2) |
| x2-4 |
| x |
=
| 4 |
| (x+2)(x-2) |
| (x+2)(x-2) |
| x |
=
| 4 |
| x |
故答案为:
| 4 |
| x |
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