# What is conjugate of 8 + 4i?

Dec 7, 2015

$8 - 4 i$
Simply switch the sign of the imaginary part (the part with the $i$).
For example, the (complex) conjugate of $a + b i$ is $a - b i$.
Thus, the complex conjugate of $8 + 4 i$ is $8 - 4 i$.