Question

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

Answer 1

Hello,

$\overline{2-8i}=2+8i$
Answer B

Answer 2

Hi,

The complex number is

z = a+bi

For a = 2 and b = -8 

z = 2+(-8)i
z = 2-8i

The conjugate is 

z = a-bi

For a = 2 and b = -8 

z = 2-(-8)i
z = 2+8i

Answer:

B. 2+8i