Question

20 Efectuați calculele:
a V5(3+V15)-(175-120);
c (V150 - V196):V3-(V90-V360):
V5;

Answer 1

Salut! ♡

a.

$\sqrt{5} \times (3 + \sqrt{15} ) - ( \sqrt{75} - \sqrt{20} )$

$3 \sqrt{5} + \sqrt{75} - \sqrt{1500}$

$3 \sqrt{5} + 5 \sqrt{3} - (10 \sqrt{15} )$

$3 \sqrt{5} + 5 \sqrt{3} - 10 \sqrt{15}$

b.

$( \sqrt{150} - \sqrt{96} ) \div \sqrt{3} - ( \sqrt{90} - \sqrt{360} ) \div \sqrt{5}$

$(5 \sqrt{6} - 4 \sqrt{6} ) \div \sqrt{3} - (3 \sqrt{10} - 6 \sqrt{10} ) \div \sqrt{5}$

$\sqrt{6} \div \sqrt{3} - ( - 3 \sqrt{10} ) \div \sqrt{5}$

$\sqrt{2} + 3 \sqrt{10} \div \sqrt{5}$

$\sqrt{2} + 3 \sqrt{2}$

$4 \sqrt{2}$

Succes!