Question

Dados A= 1 + 3i e B= 2 + 5i, calcule:

a) A + B
b) A - B
c) A x B
d) A : B

Answer 1

a) A + B = 1+3i + 2+5i = 3 + 8i

b) A - B = 1+3i - 2-5i = -1 - 2i

c) A x B = (1+3i).(2+5i)=2+5i+6i-15= -13+11i

d) A : B =

(1+3i)/(2+5i) × (2-5i) /(2-5i) =

2-5i+6i-15 / 4+25 =

-13+i / 29