Question

Dados os números complexos Z1= 6-i e Z2= 1+4i. Calcule o valor de Z1 . Z2- (Z1+Z2)

Answer 1

$z_1=6-i,\ z_2=1+4i\\\\ \omega=z_1z_2-(z_1+z_2)\ \to\ \omega=(6-i)(1+4i)-(6-i+1+4i)\ \to\\\\ \to\ \omega=6+24i-i-4i^2-(7+3i)\ \to\ \omega=6+23i+4-7-3i\ \to\\\\ \to\ \boxed{\omega=3+20i}$