Example from PID Controllers for Time-Delay Systems pg 48

Ns = (s^3) + 3  (s^2) + 2  s - 2;
Ds = 
        (s^4) + 5  (s^3) + 10  (s^2) + 4  s + 6;
pcs = Ds + k Ns;
tbl = RouthTabulation[pcs];
cond = Apply[And, Map[(# > 0. ) &, tbl]]

Reduce[cond]