# How do you find the complex conjugate of 5 - 4i?

Dec 6, 2015

$5 + 4 i$
Switch the sign of the imaginary part (the part with the $i$).
For example, the complex conjugate $a + b i$ is $a - b i$.
In your case, the complex conjugate of $5 - 4 i$ is $5 + 4 i$.