УПРОСТИТЕ 2√20 + √80

Ответ:Пошаговое объяснение:

kristinacucminova @kristinacucminova

July 2022 1 9 Report

УПРОСТИТЕ 2√20 + √80 - √125

Answers & Comments

sergeevaolga5

Ответ:

$3\sqrt{5}$

Пошаговое объяснение:

$2\sqrt{20}+\sqrt{80}-\sqrt{125}=\\\\=2\sqrt{4*5}+\sqrt{16*5}-\sqrt{25*5}=\\\\=2\sqrt{2^2*5}+\sqrt{4^2*5}-\sqrt{5^2*5}=\\\\=2*2\sqrt{5}+4\sqrt{5}-5\sqrt{5}=\\\\=4\sqrt{5}+4\sqrt{5}-5\sqrt{5}=\\\\=(4+4-5)\sqrt{5}=3\sqrt{5}$

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