Question

Efetue:
a) (4+i) . (2-i) + 3+ i
b) 14+ 3i+ (1-2i) - (3+i)

Answer 1

a)faça a distributiva
(8-4i+2i-i²)+3+i
(8-2i-(-1))+3+i
8-2i+1+3+i
8+1+3-2i+i
12-i ou 12+i³

b)14+3i+1-2i-3-i
14+1-3+3i-2i-i
15-3+3i-3i
12+0i
12