Question

Which of the following is the conjugate of a complex number with −4 as the real part and 2 as the imaginary part?

2i − 4

2i + 4

−4 − 2i

−4 + 2i

Answer 1

First, let's write the given complex number: If -4 is the real part and 2 is the imaginary part, then the complex number is -4 + 2i.
second, let's write the conjugate of that. Simply copy -4 + 2i, but replace the + sign with the - sign. Your turn.