Question

Qual o módulo do número complexo z = 2 + i/ 2-i.

Answer 1

$\frac{2+i}{2-i} * (2+i) \\ \\ z = \frac{4+2i+2i+i^2}{4-2i+2i-i^2} \\ \\ z = 1+0.i+1.i+0.i \\ \\ z = 1+i \\ z=1-i$