Răspuns:
2a+10i=(13+20i):2 mutam 2 in stanga egalului
(2a+10I)×2=13 +20i
2a×2+10i×2=13+20i
4a+20i=13+20i
egalam partea reala cu partea reala
4a=13 mutam 4 in dreapta
a=13:4=3,25
b) 12-3bi=12+18i
egalam partea imaginara cu partea imaginara
-3bi=18i
neglijam i
-3b=18 mutam -3 in dreapta
b=18:(-3)=-6