Question 618435
{{{ ( x + (2y)*i )*( x + (2y)*i ) }}}
{{{ x^2 + (2x*y)*i + (2x*y)*i + (2y)^2*i^2 }}}
{{{ x^2 + 4y^2*(-1) + ( 4x*y)*i }}}
{{{ ( x^2 - 4y^2) + i*( 4x*y ) }}}