a= 1/2:√0,25-√192/6+√27/9
a=1/2*1/√0,25-8√3/6+3√3/9
a=1/2*1/√1/4-4√3/3+√3/3
a=1/2*2-4√3/3+√3/3
a=1/2*2-4√3/3+√3/3
a=1-4√3/3+√3/3
a=1-√3
b=1,4*√3-√12/5+√80/√5
b=1,4*√3-√12/5+√16
b=1,4*√3-2√3/5+√16
b=7/5*√3-2√3/5+√16
b=√3+√16
b=√3+4
modul 1-√3 - modul √3+4 =
=√3-1-(√3+4)=
=√3-1-√3-4=
=-5