a) 2√3(3√3+√2) + √2(5√2-√3) =
= 6√9 +2√6+ 5√4 - √6 = 18+10+√6 = 28+√6
b) 3√2(2√2-√3) - √3(4√3-2√2) =
= 6√4 - 3√6 - 4√9 + 2√6 =
= 12 - 3√6 - 12 + 2√6 = -√6
c) √5/2 (2√3-4√10) + √2/3 (6√2-9√3) =
= (√5/2)*2√3 - (√5/2)*4√10 + (√2/3)*6√2 - (√2/3)*9√3 =
= √15-2√50 + 2√4-3√6 =
= √15 - 10√2 + 4 -3√6
d) 10√2(1,5√2-1,2√3) - 10√3(0,6√3-0,5√2) =
= 15√4-12√6 - 6√9+5√6 =
= 30 - 6√6 - 18 = 12-6√6
