Question 111092
I think this is what you're asking
{{{abs(z+z^0)}}}
where {{{z}}} is a complex number ({{{z=x+iy}}}) and {{{z^0}}} is its complex conjugate ({{{z^0=x-iy}}}). 
The real part of {{{z+z^0}}} is : x+4x=5x.
The imaginary part of {{{z+z^0}}} is: iy-4iy=-3iy
{{{z+z^0=5x-3iy}}}
{{{abs(z+z^0)=sqrt(5x^2+3y^2)}}}