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QUESTION
What is the complex conjugate of ##sqrt(-13)##?
The complex conjugate of ##sqrt(-13)## is ##(-sqrt(-13))##
The complex conjugate of ##a+bi## is ##a-bi##
##sqrt(-13)## can be written as ##0+sqrt(13)i##
So its complex conjugate is ##0-sqrt(13)i = -sqrt(13)i = -sqrt(-13)##
