
addition (of complex numbers)


If the complex numbers z_{1} and z_{2} are represented by the points P_{1} and P_{2} in the complex plane in which z_{1}=a+bi and z_{2}=c+di, then z_{1}+z_{2}=(a+c)+(b+d)i. z_{1}+z_{2} can be represented in the complex plane by such a point Q that OP_{1}QP_{2} forms a parallelogram.

