maths F.2~ THZ!!!

6, 2√2 - 7√2 + 3√2

9. √3 +√27

12 √6-√3/2

15. 2√3 x 3√21

18 . √486 - √96 + √24

20, √2/3 + √6 - 3√242/3

22, √28 x√35 x √20

24, 2√3 (√15 - 3√5 )

26 ,, 3√7 (-√14+2√2 - 3√3)

28 (√2+ √5) ( √2 + √5)