题目内容
(1)(| 27 |
| 48 |
| 3 |
(2)12
|
|
| 1 |
| 2 |
| 24 |
分析:(1)先化简二次根式,再计算即可;
(2)先化简二次根式,再合并同类二次根式即可.
(2)先化简二次根式,再合并同类二次根式即可.
解答:解:(1)原式=(3
-4
)×
=3
×
-4
×
=9-12
=-3;
(2)原式=12×
-6×
-2×
×
=4
-3
-
=0.
| 3 |
| 3 |
| 3 |
=3
| 3 |
| 3 |
| 3 |
| 3 |
=9-12
=-3;
(2)原式=12×
| ||
| 3 |
| ||
| 2 |
| 1 |
| 2 |
| 6 |
=4
| 6 |
| 6 |
| 6 |
=0.
点评:本题考查了二次根式的混合运算,是基础知识要熟练掌握.
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