Răspunsuri

Cel mai inteligent răspuns!
2014-06-19T11:28:08+03:00
E simplu, (1-2i)(3i-1)=3i-1+6+2i=5i+5 pt ca i^2=-1
dupa ai asa (5(i+1)/5)^4... 5 cu 5 se simplifica si ai (i+1)^2(i+1)^2
(i+1)^2=2i
2i*2i= 4 i^2=-4
2014-06-19T11:49:32+03:00

[(3i - 1 - 6i^2 + 2i)/5]^2=[5i - 1+6/5]^2=[(5i+5)/5]^2=(i+1)^4=(i^2+1+2i)^2=(2i)^2= 4i^2= - 4