题目内容
计算与化简：
（1）-(
)-1+(-2)2×(-1)0-|-
|
（2）
÷(x+2-
)．
（1）-(
| 1 |
| 3 |
(
|
（2）
| x-3 |
| 2x-4 |
| 5 |
| x-2 |
（1）-(
)-1+(-2)2×(-1)0-|-
|
=-
+4×1-|-
|
=-3+4-
=1-
=
；
（2）原式=
÷(
-
)
=
÷
=
×
=
．
| 1 |
| 3 |
(
|
=-
| 1 | ||
|
| 2 |
| 3 |
=-3+4-
| 2 |
| 3 |
=1-
| 2 |
| 3 |
=
| 1 |
| 3 |
（2）原式=
| x-3 |
| 2(x-2) |
| (x+2)(x-2) |
| x-2 |
| 5 |
| x-2 |
=
| x-3 |
| 2(x-2) |
| x2-9 |
| x-2 |
=
| x-3 |
| 2(x-2) |
| x-2 |
| (x+3)(x-3) |
=
| 1 |
| 2(x+3) |
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