Question

$2 \sqrt{1 \div 2}$
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Answer 1

Olá!

$2 \sqrt{1 \div 2} = \\ 2 \sqrt{ \frac{1}{2} } = \\ \\ 2 \cdot \frac{1}{ \sqrt{2} } = \\ \\ \frac{2}{ \color{red} {1}} \cdot \frac{1}{ \sqrt{2} } = \\ \\ \frac{2\cdot1}{1\cdot \sqrt{2} } = \\ \\ \frac{2}{ \sqrt{2} } = \\ \\ \frac{2}{ \sqrt{2} } \cdot \frac{ \sqrt{2} }{ \sqrt{2} } = \\ \\ \frac{2\cdot \sqrt{2} }{ \sqrt{2} \cdot \sqrt{2} } = \\ \\ \frac{2 \sqrt{2} }{ \sqrt{4} } = \\ \\ \frac{\diagup\!\!\!\!2 \sqrt{2} }{\diagup\!\!\!\!2} \\ \\ \boxed{ \bf{ \sqrt{2} } }$

Espero ter ajudado! :)