题目内容
化简：| x2-3x |
| x-3 |
| x2-1 |
| x+1 |
| 1 |
| x-1 |
分析：将分子因式分解，除法化为乘法，通分即可．
解答：解：原式=
•
-
=
-
=1．
| x(x-3) |
| x-3 |
| x+1 |
| (x+1)(x-1) |
| 1 |
| x-1 |
=
| x |
| x-1 |
| 1 |
| x-1 |
=1．
点评：本题考查了分式的混合运算．关键是根据混合运算的步骤，因式分解，约分．
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题目内容
化简：| x2-3x |
| x-3 |
| x2-1 |
| x+1 |
| 1 |
| x-1 |
| x(x-3) |
| x-3 |
| x+1 |
| (x+1)(x-1) |
| 1 |
| x-1 |
| x |
| x-1 |
| 1 |
| x-1 |