Question

Sabendo que Z = 3 – 2i, determine o valor de Z. = :

(A) 5
(B) 7
(c) 11
(D) 13

Answer 1

Boa tarde

z = 3 - 2i
z' = 3 + 2i

zz' = (3 - 2i)*(3 + 2i) = 9 + 4 =13 (D) 

Answer 2

z = 3-2i
z'= 3+2i

z*z' = (3-2i).(3+2i)
z*z' = 9 +6i-6i-4i^2
z*z'= 9+4
z*z'=13