Question

Sendo z1=2+51 e z2=4 -2i

B)z1.z2
C)z2-z1

Answer 1

b) (2+5i)·(4-2i)
8-4i+20i-10i^2
8+16i+10
18+16i

c) (4-2i) - (2+5i)
4-2i-2-5i
2-7i