How can use complex mode on casio fx 82ms?

To use complex mode on the Casio fx-82MS, press the "MODE" button repeatedly until you find the option for complex numbers, which is often labeled as "CMPLX" or similar. Once in complex mode, you can input complex numbers in the form a + bi, where "a" is the real part and "b" is the imaginary part. You can then perform calculations like addition, subtraction, multiplication, and division with these complex numbers. To exit complex mode, simply repeat the mode selection process and choose the standard calculation mode.