Question

√80 + √45 sobre 2 - 2√245 sobre 3

Answer 1

80=2.2.2.2.5
45=3.3.5
245=5.7.7

V80+V45/2-2V245/3=
V2.2.2.2.5+V3.3.5/2-2V5.7.7/3=
4V5+3V5/2-2.7V5/3=
4V5+3V5/2-14V5/3=
6.4V5/6+3.3V5/6-2.14V5/6=
24V5/6+9V5/6-28V5/6=
5V5/6