Question

fatore e simplifique

a.^3√27

b.^3√125

c.^3√27/125

d.√189

e.√-25

Answer 1

$a)~~ \sqrt[3]{27} = \sqrt[3]{3^3} =3 \\ \\ b)~~ \sqrt[3]{125} = \sqrt[3]{5^3} =5 \\ \\ c)~~ \sqrt[3]{ \frac{27}{125} } = \sqrt[3]{ \frac{3^3}{5^3} } = \frac{3}{5} \\ \\ d)~~ \sqrt{189} = \sqrt{3^2.3.7} =3 \sqrt{21} \\ \\ e)~~ \sqrt{-25} =~~n/existe \\ \\ podemos~~calcular~~como~~n\'umeros~~complexo \\ \\ \sqrt{-25} = \sqrt{-i5^2} =5i$