you can show an imaginary root without using Symbolic Math Toolbox?

i have dude

[Erwin Avendaño]

   set(handles.edit15,'string', sprintf ('%g%+gi',real(x1),imag(x1)) )
set(handles.edit16,'string', sprintf ('%g%+gi',real(x2),imag(x2)) )
set(handles.edit17,'string', sprintf ('%g%+gi',real(x3),imag(x3)) )
set(handles.edit18,'string', sprintf ('%g%+gi',real(x4),imag(x4)) )