2корень из2+корень из 18

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$2\sqrt{2}+\sqrt{18}-\sqrt{32}=2\sqrt{2}+\sqrt{9*2}-\sqrt{16*2}=\\\\ 2\sqrt{2}+\sqrt{9}*\sqrt{2}-\sqrt{16}*\sqrt{2}=\\\\ 2\sqrt{2}+3\sqrt{2}-4\sqrt{2}=(2+3-4)\sqrt{2}=\sqrt{2}$

tane4a Спасибо

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