Question

what's the value of a*-a​

Answer 1

$- {a}^{2}$

Hope it's helpful to you

Answer 2

Answer:

assuming a* be as complex conjugate of a

a* = real(a) -i (imaginary(a))

a = real(a) + I (imaginary (a))

a*-a = -2i(imaginary (a))

hope this is what your question was about.