题目内容
计算：
-
-
=______．
| x2-5 |
| x-2 |
| x |
| x-2 |
| 1+x |
| 2-x |
原式=
-
+
=
=
=x+2．
故答案为：x+2．
| x2-5 |
| x-2 |
| x |
| x-2 |
| 1+x |
| x-2 |
=
| x2-5-x+1+x |
| x-2 |
=
| (x+2)(x-2) |
| x-2 |
=x+2．
故答案为：x+2．
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