Question

Racionaliza as contas Help

Answer 1

Explicação passo-a-passo:

$a) \frac{2}{ \sqrt{2} } = \frac{2 \times \sqrt{2} }{ \sqrt{2} \times \sqrt{2} } = \frac{2 \sqrt{2} }{ {( \sqrt{2} })^{2} } = \frac{2 \sqrt{2} }{2} = \sqrt{2} \\ b) \frac{ \sqrt{2} }{ \sqrt{10} } = \frac{ \sqrt{2} \times \sqrt{10} }{ \sqrt{10} \times \sqrt{10} } = \frac{ \sqrt{2 \times 10} }{ ({ \sqrt{10} })^{2} } = \frac{ \sqrt{20} }{10}$