Question

sal

(√3 + √5) · √8 - √2√15

Answer 1

$(\sqrt{3}+\sqrt{5})\cdot\sqrt{8}-\sqrt{2}\sqrt{15}=$
$\sqrt{3}\sqrt{8}+\sqrt{5}\sqrt{8}-\sqrt{30}=$
$\sqrt{24}+\sqrt{40}-\sqrt{30}=$
$2\sqrt{6}+2\sqrt{10}-\sqrt{30}=$
$2(\sqrt{6}+\sqrt{10})-\sqrt{30}$