i²=-1
z₁*(z₃-z₂)= (3-4i)*(2+3i)=6+9i-8i-12i²=18+i
z₃+z₂/z₁=2-3i/(3-4i)=2-(3i*(3+4i))/(9-16i²)=2-(9i+12i²)/25=(50-9i-12i²)/25=
62/25-9i/25
i²=-1
z₁*(z₃-z₂)= (3-4i)*(2+3i)=6+9i-8i-12i²=18+i
z₃+z₂/z₁=2-3i/(3-4i)=2-(3i*(3+4i))/(9-16i²)=2-(9i+12i²)/25=(50-9i-12i²)/25=
62/25-9i/25