Question

-4
--------
10
Só que esse 10 na. Na raiz

Answer 1

$\frac{-4}{ \sqrt{10} } * \frac{ \sqrt{10} }{ \sqrt{10} } = \frac{-4 \sqrt{10} }{ \sqrt{100} } = \frac{-4 \sqrt{10} }{10}$

Answer 2

vamos lá...

racionalizar

$\frac{-4}{ \sqrt{10} } = \frac{-4 \sqrt{10} }{ \sqrt{10}. \sqrt{10} } = \frac{-4 \sqrt{10} }{ \sqrt{10^2} } = \frac{-\not4^2 \sqrt{10} }{\not10_5} = \frac{-2 \sqrt{10}}{5}$