To change the format of a complex number refers to change the format of a complex number from one format to another format so that it is easier to apply in the calculation of the values in the circuit.
Changing patterns of numbers represents the deformation of the complex from one form to another form that is easily used to calculate the values in the circuit.
Changing the form of complex number means changing the form of complex number from one format to another format to make it easy to use in the calculation of parameters in the circuit.