5n + 4 = 20
5n = 16
n = 16/5 = 3 1/5
The mathematical expression of the given complex number above is -5 + 4i. The conjugate of this complex number is that which has an opposite operation. The given is an addition operation. That is -5 - 4i. Therefore, the answer is the third among the choices.
Answer:
The answer is x and that is my solution in the photo above