⇒ You can represent complex numbers on an Argand diagram. The x-axis on an Argand diagram is called the real axis and the y-axis is called the imaginary axis.
⇒ The complex number z = x + iy is represented on the diagram by the point P(x, y), where x and y are Cartesian coordinates
⇒ Complex numbers can be represented as vectors on the Argand diagram
⇒ You can add or subtract complex numbers on an Argand diagram by adding or subtracting their corresponding vectors