Question

What are imaginary numbers and where are they used?

Answer 1

pure imaginary numbers are of the form a+ bi, where a and b are real values, but a=0

Answer 2

Imaginary numbers are numbers that can be written as a real number multiplied by the imaginary unit which is I.

Answer 3

electricity theory uses them that i can recall

Answer 4

they also exist as solutions to prime polynomials