print ((1j**2).real) --> - 1. 0 how does it work? Where can i find the answer?

Question

duel related question

Answer 1

j is, according to the definition of complex numbers in mathematics, the square root of -1, or √(-1). Now, if you square it, you are bound to get -1 as the result.

Answer 2

thank you. Never knew sub zero square roots exist