What is conjugate of #3i#? Precalculus Complex Zeros Complex Conjugate Zeros 1 Answer Trevor Ryan. Nov 4, 2015 #-3i# Explanation: For any complex number in rectangular form #z=x+iy#, the complex conjugate is given by #bar z = x-iy#. Note that #z bar z = x^2 + y^2 in RR# Answer link Related questions What is a complex conjugate? How do I find a complex conjugate? What is the conjugate zeros theorem? How do I use the conjugate zeros theorem? What is the conjugate pair theorem? How do I find the complex conjugate of #10+6i#? How do I find the complex conjugate of #14+12i#? What is the complex conjugate for the number #7-3i#? What is the complex conjugate of #3i+4#? What is the complex conjugate of #a-bi#? See all questions in Complex Conjugate Zeros Impact of this question 2479 views around the world You can reuse this answer Creative Commons License