Автор - DImon293

( sqrt{8 frac{2}{5} } -  sqrt{2 frac{1}{10} } ) :  sqrt{ frac{105}{8} }

Ответ

Проверено экспертом

Автор - NNNLLL54
...=(sqrt{frac{42}{5}}-sqrt{frac{21}{10}})cdot sqrt{frac{8}{105}}=sqrt{frac{42cdot 8}{5cdot 105}}-sqrt{frac{21cdot 8}{10cdot 105}}=sqrt{frac{16}{25}}-sqrt{frac{4}{25}}=\\=frac{4}{5}-frac{2}{5}=frac{2}{5}

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