A = 3²+5.7 Y=3-7² F = 2.3².11 A = 2².7.11 2.11 EBOB (A,Y)=21 EKOK (A,Y)= 2 d₂² 72 EBOB (F,A) = EKOK (F,A) = Y₂₁ 2.11 2.7.11 S​