Question

Un patrat are aria suprafetei 60 cm patrati. Ce lungime are latura sa?

Answer 1

A = l²
l = √A = √60 = 2√15cm 

Answer 2

$A_{patrat}=l^{2}$

$A_{patrat}=60cm^{2}$

$=>l^{2}=60cm^{2}$

$=>l=\sqrt{60}$

$60=2^{2}*3*5$

$=>l=\sqrt{2^{2}*3*5}$

$=>l=2\sqrt{3*5}$

$=>\boxed{l=2\sqrt{15}(cm)}$