Question

What is the complex conjugate of $7-8i$?

Answer 1

The complex conjugate of a complex number is the number with an equally real part and an imaginary part equal in magnitude but opposite in sign.

The conjugate of a complex number $a+ib$ is $a-ib$.

The complex conjugate of $z=7-8i$ is,

$\overline{z}=7+8i$

Hence, the complex conjugate of $7-8i$ is $7+8i$.