题目内容
(1)计算:(
-
)0×(
)-1+
(2)化简:
+
| 3 |
| 2 |
| 1 |
| 2 |
| 3 | -8 |
(2)化简:
| 4 |
| a2-4 |
| 1 |
| 2-a |
(1)原式=1×2-2=0;
(2)原式=
-
=
=-
.
(2)原式=
| 4 |
| (a+2)(a-2) |
| a+2 |
| (a+2)(a-2) |
| 4-a-2 |
| (a+2)(a-2) |
| 1 |
| a+2 |
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