(1/2+2/√5 - 0,4·√5)+(2,5+2√6·√2)·3-√48=
[1/2+(2√5)/5-(2√5/5)]+(5/2+2√12)·3-4√3=
(1/2+(5/2)·3+2√3·3-4√3=
=1/2+15/2+6√3-4√3
=16/2+2√3
=8+2√3
5.
√432/√1152=x/√288
432=2⁴·3³; √432=√2⁴·3³=4·3√3
1152=2⁷·3²; √1152=24√2
288=2⁵·3³; √288=2²·3√2
(4·3√3)/(24√2)x/(2²·3√2)
√432/√1152=x/√288 devine
2²·3√3·3·2²√2=x·3·8√2
x = 6√3
