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