题目内容
计算:
(1)
+(π-
)0-2sin30° ;
(2)
-
.
(1)
| 12 |
| 3 |
(2)
| 2 |
| x-2 |
| 8 |
| x2-4 |
(1)原式=2
+1-2×
=2
;
(2)原式=
-
=
.
| 3 |
| 1 |
| 2 |
=2
| 3 |
(2)原式=
| 2(x+2) |
| (x+2)(x-2) |
| 8 |
| (x+2)(x-2) |
=
| 2 |
| x+2 |
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