電子課本網(wǎng) › 第113頁

第113頁

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$解：???=(2\sqrt {2})2-(3\sqrt {3})2???$

$??? =8-27???$

$??? =-19???$

$解：???=6+4\sqrt {2}-3\sqrt {2}-4???$

$??? =2+\sqrt {2}???$

$解：???=\sqrt {3}-3\sqrt {5}-\frac {3\sqrt {5}}{5}???$

$??? =\sqrt {3}-\frac {18\sqrt {5}}{5}???$

$解：???=(3\sqrt {5})2-2×3\sqrt {5}×5\sqrt {2}+(5\sqrt {2})2???$

$??? =45-30\sqrt {10}+50???$

$??? =95-30\sqrt {10}???$

$解：???=5\sqrt {2}-2\sqrt {2}+2???$

$??? =3\sqrt {2}+2???$

$解：???=\sqrt {2}+1+3-3\sqrt {2}+2\sqrt {2}???$

$??? =4???$

$解：???=(20\sqrt {3}+2\sqrt {3}-6\sqrt {7})??????÷\sqrt {3}???$

$??? =22-2\sqrt {21}???$

$解：???=4\sqrt {3}+3\sqrt {6}÷\sqrt {2}??????+3+\sqrt {3}-\sqrt {3}-1???$

$??? =4\sqrt {3}-3\sqrt {3}+3+\sqrt {3}-\sqrt {3}-1???$

$??? =2+\sqrt {3}???$

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