题目内容
化简:(1)2
| 12 |
1
|
5
|
2
| ||
| 3 |
(2)
| 2 |
| b |
| ab2 |
| 6a |
| b2 |
|
| 2 |
| 3 |
| a3b |
分析:根据二次根式的乘除法法则,统一成乘法运算,进行求解即可.
解答:解:(1)原式=4
+
-
-
=
;
(2)∵a>0,b>0;
∴原式=
×
×(-
),
=-
×
×
=-
a2b2
.
| 3 |
6
| ||
| 3 |
4
| ||
| 3 |
8
| ||
| 3 |
6
| ||
| 3 |
(2)∵a>0,b>0;
∴原式=
| 2 |
| b |
| ab2 |
| b2 |
| 6a |
|
| 2 |
| 3 |
| a3b |
=-
| 2 |
| b |
| b2 |
| 6a |
| 2 |
| 3 |
ab2×
|
| 2 |
| 9 |
| a |
点评:正确理解二次根式乘除法运算规则、积的算术平方根等概念是解答问题的关键.
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