Berechne:
\(\eqalign{ & w = {z_1} + {z_2} \cr & {z_1} = 4 + 5i \cr & {z_2} = 2 + 3i \cr}\)
\(w = - 6 - 8i\)
\(w = - 6 + 8i\)
\(w = 6 + 8i\)
\(w = 6 - 8i\)