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a) (3+i)(1+i)
b) (2+3i)(2-3i)
c) (2-2i)^2


Răspuns :

Răspuns:

(3+i)(1+i)=3+3i+i+i'2=i'2+4i-3 unde ila putereaa 2 este-1

-1+4i+3=2+4i

(2+3i)(2-3i)=4-9i^2= 4+9=13