What is the use/need of complex numbers in real life if they are imaginary?

Question

What is the use/need of complex numbers in real life if they are imaginary?

In: 3753

Answer 1

They make calculating and understanding things easier. But you don’t need them, it’s possible to reformat maths/physics to not use them.

Edit:

Sabine’s video on this is a useful insight into the debate on whether imaginary numbers are real or needed.