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fie z=2+ 3i calculati 2(3-5i)+3(-4+3i) va rog

Răspuns :

2(3-5i)+3(-4+3i)=
6-10i-12+9i
-1i-6
-1i=6
-i=6/1
i=-6
z=2+3*(-6)=2-18
z=-16