题目内容
计算
+
-
=
+
+
.
| 2 |
|
|
| ||
| 2 |
| ||
| 3 |
| ||
| 2 |
| ||
| 3 |
分析:先把各二次根式化为最简二次根式,然后合并即可.
解答:解:原式=
+
-
=
+
.
故答案为
+
.
| 2 |
| ||
| 3 |
| ||
| 2 |
=
| ||
| 2 |
| ||
| 3 |
故答案为
| ||
| 2 |
| ||
| 3 |
点评:本题考查了二次根式的加减法:先把各二次根式化为最简二次根式,然后合并同类二次根式.
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