Aflati suma a+b= cand : a=√72•(1/√8 - 1/√18) si b=√2 + 1/1-√2

Răspuns :

a=6√2·(1/2√2 -1/3√2)=6·(1/2 - 1/3)=6· 1/6=1
b=√2+1/1-√2=1
a+b=1+1=2