Question

Determine a parte real e imaginária de Z=(1-3i)(4+i)(3i+1).

Answer 1

Z=(1-3i)(4+i)(3i+1).

Z=(4+i-12i+3)(3i+1)

Z=(7-11i)*(3i+1)

Z=21i+7+33-11i

Z=40+10i

Real=40

Imaginária =10i