Răspuns :
-3 I x+2I +5 I x+2I +2 Ix+2I = 12-7
4Ix+2I =5 :4
Ix+2I =5/4 daca x+2 =5/4 ; x= - 3/4
x+2 =- 5/4 ; x =- 5/ 4 -2 ; x=- 13/4
4Ix+2I =5 :4
Ix+2I =5/4 daca x+2 =5/4 ; x= - 3/4
x+2 =- 5/4 ; x =- 5/ 4 -2 ; x=- 13/4