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1 + i supra 2 - 3i + 1 - i supra 2 + 3i

Răspuns :

[tex]\dfrac{(1+i)(2+3i)+(1-i)(2-3i)}{2^2-9i^2}=[/tex]

[tex]=\dfrac{2+3i+2i-3+2-3i-2i-3}{7}=-\dfrac{2}{7} [/tex]
Am tinut sema ca i²=-1