Question

racionalize as expressões abaixo:

a) 2/10
b) 20/3✓10

Answer 1

$b= \frac{20}{3 \sqrt{10} } . \frac{ \sqrt{10} }{ \sqrt{10} } = \frac{20 \sqrt{10} }{3.10} = \frac{20 \sqrt{10} }{30} = \frac{2 \sqrt{10} }{3}$$a= \frac{2}{ \sqrt{10} } . \frac{ \sqrt{10} }{ \sqrt{10} } = \frac{2 \sqrt{10} }{10} = \frac{ \sqrt{10} }{5}$