Question

Racionalizar
A 2÷√5
B √7÷√3​

Answer 1

a)

$\frac{2}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } = \frac{ 2\sqrt{5} }{ \sqrt{25}} = \frac{ 2\sqrt{5} }{5}$

b)

$\frac{ \sqrt{7} }{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{ \sqrt{21} }{ \sqrt{9} } = \frac{ \sqrt{21} }{3}$

Espero ter ajudado!✌️