题目内容
化简
-
.
| 2 |
| x2-4 |
| 1 |
| 2x-4 |
原式=
-
=
=
=-
.
| 2 |
| (x+2)(x-2) |
| 1 |
| 2(x-2) |
=
| 4-(x+2) |
| 2(x+2)(x-2) |
=
| 2-x |
| 2(x+2)(x-2) |
=-
| 1 |
| 2(x+2) |
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题目内容
| 2 |
| x2-4 |
| 1 |
| 2x-4 |
| 2 |
| (x+2)(x-2) |
| 1 |
| 2(x-2) |
| 4-(x+2) |
| 2(x+2)(x-2) |
| 2-x |
| 2(x+2)(x-2) |
| 1 |
| 2(x+2) |