Question

Calculat,rad (2-rad5)^2+rad (3rad3-6)^2+rad (-rad5-1)^2 este :
A.2rad5-3rad3+5 Acestart este raspunsul corect

Answer 1

Un radical la patrat sau radical dintr-un patrat face patratul si radicalul sa se anuleze
$N=2-\sqrt{5}+3\sqrt{3}-6+(-\sqrt{5})-1$
$N=2-6-1-\sqrt{5}+3\sqrt{3}+(-\sqrt{5})$
$N=-5-\sqrt{5}+3\sqrt{3}-\sqrt{5}$
$N=-5-\sqrt{5}-\sqrt{5}+3\sqrt{3}$
$N=-5-2\sqrt{5}+3\sqrt{3}$
$N=3\sqrt{3}-5-2\sqrt{5}$
$N=3\sqrt{3}-2\sqrt{5}-5$