14. (-7/2+1)×(-3√2)=
=(-7/2+2/2)×(-3√2)=
= -5/2×(-3√2)=15√2/2
b) pozitiv
15. 8√6:2√3=4√2
C.4√2
16. (√6)²×2/3=
=6×2/3=
=2×2=4