Home > Precalculus > Division of Complex Numbers

What is the conjugate of the complex number -9 + 5i?

Answer 1

#-9-5i#

When you have a complex number in the form #a+bi#, its conjugate can be found by reversing the sign on the imaginary portion of the number, yielding the complex conjugate #a-bi#.

So, for the complex number #-9+5i#, the #+5i# is the imaginary part. In the complex conjugate, its sign will be #-# instead of #+#, so the complex conjugate of #-9+5i# is

#-9-5i#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Chloe Alexander

The conjugate of the complex number -9 + 5i is -9 - 5i.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.