Question

Calculati a) radical 1,44 + radical 50 - 5 la patrat = b) 2 · radical 3 · 5 · radical 13 = va rog dau coroana

Answer 1

a)
$\sqrt{1.44} + \sqrt{50 - 5 {}^{2} } =$
$\sqrt{ \frac{36}{25} } + \sqrt{50 - 25} =$
$\frac{5}{6} + \sqrt{25} =$
$\frac{5}{6} + 5 =$
$\frac{31}{5} sau \: 6.2$
b)
$2 \sqrt{3} \times 5 \sqrt{13} =$
$10 \sqrt{3 \times 13} =$
$10 \sqrt{39}$