A cura di: Antonio Bernardo
$(5+2 sqrt(2))*sqrt(33-20*sqrt(2))$
Portiamo sotto radice elevando al quadrato
$sqrt((5+2 sqrt(2))^2 *(33-20*sqrt(2)))$
$sqrt((25+8+20 sqrt(2))*(33-20 sqrt(2)))$
$sqrt((33+20 sqrt(2))*(33-20 sqrt(2)))$
$sqrt(33^2 -400*2)$
$sqrt(1089-800)$
$sqrt(289)$
$17$
- Radicali