Question

Calculeaza 4 radical din 18 + 3 radical din 8 - 5 radical din 50 =

Answer 1

$4 \sqrt{18}=4 \sqrt{2*9} =12 \sqrt{2}$
$3 \sqrt{8}=3 \sqrt{4*2}=6 \sqrt{2}$
$5 \sqrt{50}=5 \sqrt{25*2}=25 \sqrt{2}$
$12 \sqrt{2}+6 \sqrt{2}-25 \sqrt{2}=-7 \sqrt{2}$