(3+2i)la a 2 -(2+4i) la a 2???? ajutatimaaaaa

Răspuns :


(3+2i)² -(2+4i)²=9+12i-4-4-16i+16=5-4i+12=17-4i
i²=-1
9-4+12i-(4-16+16i)=5+12i-(-12+16i)=5+12i+12-16i=17-4i