What is the complex conjugate of 7i?

1 Answer
Daniel L.
Oct 21, 2015

The complex conjugate of #7i# is #-7i#

Explanation:

The complex conjugate of a number #z# is a number with opposite imaginary part.

So if #z=a+bi# then conjugate is: #bar(z)=a-bi# for any #a,b in RR#

We can note, that if we represent all complex numbers in coordinate system, then for any number: the number #z# and its conjugate #bar(z)# are symetrical according to "real part" axis.

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