//equation//
ieee(2);
syms p K s;
m=s^3+(p*s^2)+(K+3)*s+(2*(K+1))
cof_a_0 = coeffs(m,'s',0);
cof_a_1 = coeffs(m,'s',1);
cof_a_2 = coeffs(m,'s',2);
cof_a_3 = coeffs(m,'s',3);
r=[cof_a_0 cof_a_1 cof_a_2 cof_a_3] 
n=length(r);
routh=[r([4,2]);r([3,1])];
routh=[routh;-det(routh)/routh(2,1),0];
t=routh(2:3,1:2); //extracting the square sub block of routh matrix
routh=[routh;-det(t)/routh(3,1),0];
disp(routh,"routh=")