Question

Determine as raízes quadradas exatas:
a) 

b) 

c) 

d) 

e)

f)

Cálculos, por favor.

Answer 1

a )

$\sqrt{64}~\to~ \sqrt{8^2}~\to~8$

b )

$\sqrt{0,64} ~\to~ \sqrt{ \frac{64}{100} } ~\to~ \frac{8^{\div2}}{10^{\div2}} ~\to~ \frac{4}{5}$

c )

$\sqrt{0,0064} ~\to~ \sqrt{ \frac{64}{10000} } ~\to~ \frac{8}{100} ~\to~ \frac{4}{25}$

d )

$\sqrt{640000} ~\to~ \sqrt{64*10000} ~\to~ \sqrt{8^2}* \sqrt{10^4} ~\to~8*100 ~\to~800$

e )

$\sqrt{ \frac{81}{144} } ~\to~ \frac{ \sqrt{81} }{ \sqrt{144} } ~\to~ \frac{9}{12} ~\to~ \frac{3}{4}$

f )

$\sqrt{1,21} ~\to~ \sqrt{ \frac{121}{100} } ~\to~ \frac{11}{10}$