Question

3
$3by \sqrt{5}$
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Answer 1

3 / √5 = 3√5 / 5

Hope it's helpful to you

Answer 2

$\frac{3}{ \sqrt{5} }$

Rationalizing

$= \frac{3}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } \\ \\ = \frac{3 \sqrt{5} }{5}$