第30页

信息发布者:
$6\sqrt{2}$
9
$8\sqrt{2}+8$
$1-2\sqrt{3}$
$3-2\sqrt{5}$
$\sqrt{13}$
74
解:原式​$=\frac {1}{2}×2\sqrt {3}-(3×\frac {\sqrt {3}}{3}+\sqrt {2})$​
​$=\sqrt {3}-(\sqrt {3}+\sqrt {2})$​
​$=\sqrt {3}-\sqrt {3}-\sqrt {2}$​
​$=-\sqrt {2}$​
解:原式​$=3\sqrt {3}×\frac {2}{\sqrt {3}}×2\sqrt {2}-6\sqrt {2}$​
​$=6×2\sqrt {2}-6\sqrt {2}$​
​$=12\sqrt {2}-6\sqrt {2}$​
​$=6\sqrt {2}$​