The forward-path transfer function and the feedback-path transfer function of a single loop negative feedback control system are given as
$$G(s)=\frac{K(s+2)}{s^2+2s+2}\;\text{and}\hspace{0.3cm}H(s)=1,$$
respectively. If the variable parameter $K$ is real positive, then the location of the breakaway point on the root locus diagram of the system is _________