Thread: Complex number expression??

Write an expression for the sum of a complex number a + bi and its complex conjugate.

Thanks for any help!

Originally Posted by live_laugh_luv27

Write an expression for the sum of a complex number a + bi and its complex conjugate.

Thanks for any help!

Let $\displaystyle z=a+bi$ and $\displaystyle \bar{z}=a-bi$ then $\displaystyle z+\bar{z}=\left(a+bi\right)+\left(a-bi\right)=2a=2\Re(z)$