What is the complex conjugate of 2i?

1 Answer
Dec 8, 2015

Answer:

#-2i#

Explanation:

To find a complex conjugate, simply change the sign of the imaginary part (the part with the #i#). This means that it either goes from positive to negative or from negative to positive.

As a general rule, the complex conjugate of #a+bi# is #a-bi#.

While #2i# may not seem to be in the #a+bi# form, it can be written as #0+2i#.

Therefore, the complex conjugate of #0+2i# is #0-2i#, which is equal to #-2i#.