题目内容
(
-4
)-2(
-
).
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|
|
| 12 |
分析:首先化简各二次根式,进而合并即可.
解答:解:原式=(
×3
-4×
)-2(
-2
)
=
-
-
+4
=
.
| 1 |
| 3 |
| 3 |
| ||
| 3 |
| ||
| 2 |
| 3 |
=
| 3 |
4
| ||
| 3 |
| 3 |
| 3 |
=
| 8 |
| 3 |
| 3 |
点评:此题主要二次根式的化简求值,正确化简二次根式是解题关键.
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