am nevoie urgent 5. Calculează:


a) (sqrt(3) + sqrt(2)) * sqrt(3)
b) √2. (sqrt(6) - 2sqrt(10))
c) 3. (√20+ √3) - √3. (sqrt(5) + 3)
d) (sqrt(18) + sqrt(12)) * 3sqrt(2) - sqrt(216)
e) √20+3√10. (3sqrt(2) - sqrt(5)) ;
f) √6 (3√10+8√20:2).​