We can add complex numbers by summing their respective real and imaginary parts. If z1 = a1 + ib1 and z2 = a2 + ib2, then z1 + z2 = (a1 + a2) + i(b1 + b2)
Multiplication
We can multiply complex numbers the following way: (a1 + ib1)(a2 + ib2) = a1(a2 + ib2) + ib1(a2 + ib2)