4) Найдите сумму, произведение и частное чисел: z1=–3 – 4i, z2=1 – 3i

z1+z2=-3-4i+(1-3i)=-2-7i z1*z2=(-3-4i)*(1-3i)=-3*1-4i*1+9i+12 (i^2)=-3+5i-12=5i-15 z1/z2=(-3-4i) / (1-3i)=(-3-4i)*(1+3i) / (1-3i)*(1+3i)=(-3-4i-9i-12 (i^2) / (1-9 (i^2)=(-3-13i+12) / (1+9)=(9-13i) /10=0,9-1,3i