Răspuns :
(3+4i)^4=((3+4i)²)=(9+24i+16i²)²=(9+24i-16)²=(-7+24i)²=49-336i+576i²=
=49-336i-576=-527-336i
I-527-336iI=√(527²+336²)=√277729+112896=625
sau o metoda mai simpla
I 3+4i I=√9+16=√25=5
5^4=625
=49-336i-576=-527-336i
I-527-336iI=√(527²+336²)=√277729+112896=625
sau o metoda mai simpla
I 3+4i I=√9+16=√25=5
5^4=625