Question

Which of the following is the conjugate of a complex number with 2 as the real part and −8 as the imaginary part?

−2 + 8i
2 + 8i
2 − 8i
−2 − 8i

Answer 1

2 − 8i?

Answer 2

The equation you need to find the conjugate of is 2-8i
Ok so a conjugate is actually very simple. In this problem, all you do is change that middle sign. So, if the sign is negative, make it positive. If the sign is positive, make it negative.

Answer 3

Since the middle sign is negative, we will make it positive. So it would be:
2+8i

Does this help you?

Answer 4

Sweet, thanks!