# What is conjugate of -a-b?

Sep 12, 2015

Without an indication of an imaginary term, there is no complex conjugate.

#### Explanation:

The complex conjugate of a real number is the real number.

So, if $a$ and $b$ are both real, then the complex conjugate of $- a - b$ is also $- a - b$

If there is a typographic error in the question and the intended question is: "What is the complex conjugate of $- a - b i$?",

then the answer is $- a + b i$.