Question

Ma poate ajuta cineva?
$2 \sqrt{160} - 3 \sqrt{90} + 5 \sqrt{40}$
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Answer 1

Răspuns:

$2 \sqrt{160} - 3 \sqrt{90} + 5 \sqrt{40} = \\ \\ = 2 \times 4 \sqrt{10} - 3 \times 3 \sqrt{10} + 5 \times 2 \sqrt{10} = \\ \\ = 8 \sqrt{10} - 9 \sqrt{10} + 10 \sqrt{10} = \\ \\ = - \sqrt{10} + 10 \sqrt{10} = \\ \\ = 9 \sqrt{10}$

Succes! ♡︎♥︎♡︎