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s=%s
F=s^6+3*s^5+4*s^4+6*s^3+5*s^2+3*s+2
disp(routh_t(F))
r=coeff(F)
routh=routh_t(F)
n=length(r)
c=0;
for i=1:n
if (routh(i,1)<0)
c=c+1;
end
end
if(c>=1)
printf("system is unstable")
else printf("there are no roots on RHS")
end
disp("s^2 is")
R=roots(routh(3,:))
disp(R)
disp("as there are 2 pairs of repeated roots on the imaginary axis, the system is unstable")
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