What is complex conjugate of #-5-7i#?

1 Answer
Dec 4, 2015

Answer:

#-5+7i#

Explanation:

The complex conjugate of the complex number #a+bi# is #a-bi#.

In other words, switch the sign (from positive to negative, or vice versa) of the term with the #i#.

Thus, the complex conjugate of #-5color(red)(-)7i# is #-5color(red)(+)7i#.