7radical24-3radical20-radical 150-2radical80=

Răspuns :

Vom notya v=radical
7v24=7x2xv6=14v6
3v20=3x2v5=6v5
v150=5v6
2v80=2x4v5=8v5

14v5-6v5-5v6-8v5=-5v6