Question

z1=-2 +4i e z2 =3- 3i .calcule z1× z2 respostaa

Answer 1

$Z_1=-2+4i\\ Z_2=3-3i\\ \\ Z_1\times Z_2=\\ \\ (-2+4i)(3-3i)=\\ -6+6i+12i-12i^2=\\ lembra~~aue~~i^2=-1\\\\-6+18i-12(-1)= \\ -6+18i+12=\\ 6+18i\\ \\ Z_1\times Z_2=6+18i$