If the characteristic equation of a closed-loop system is s² + 2s + 2 =0, then the system is

Consider the feedback control system shown in figure.
(a) Find the transfer function of the system and its characteristic equation.

(b) Use the Routh-Hurwitz criterion to determine the range of 'K' for which the system is stable.

The feedback control system in Figure is stable

The root-locus diagram for a closed loop feedback system is shown in Figure. The system is overdamped.