Question

(Help please) Which of the following expressions is the conjugate of a complex number with 3 as the real part and –2i as the imaginary part?


3 + 2i
3 – 2i
3i + 2
3i – 2

Answer 1

complex conjugate is the reflection of the number across the real axis.
in other words : flip the sign of the imaginary part.
so if the number is:
z=3-2i

the conjugate is :
3+2i