From: v on
"Kiril " <kkirqkov(a)gmail.com> wrote in message <gs89bu$3j4$1(a)fred.mathworks.com>...
> Yes now i get it...(i hope so) :-)
I did this
p=[10 0 0 0 0 -1]
>> r=roots(p)
r =

-0.5105 + 0.3709i
-0.5105 - 0.3709i
0.1950 + 0.6001i
0.1950 - 0.6001i
0.6310
for i=1:size(r,1);a=imag(r(i));if a==0;sol=r(i);end;end
>> sol
sol =
0.6310