Question

Which of the following expressions is the conjugate of a complex number with -6 as the real part and -5i as the imaginary part?
6+5i
6-5i
-6-5i <--?
-6+5i <--?
I think it might be either c or d but I'm not sure. Help?

Answer 1

A conjugate pair is of the form:
\[a \pm bi\]
Meaning you have two equations:
\[a + bi\]
\[a - bi\]
So in this case, because you have -6 - 5i as one equation, its conjugate would be D, -6 + 5i

Answer 2

Thank you :)