Determine the stability of the following dynamical system: $\begin{bmatrix}.3&.4&.5\\.3&.4&.5\\.3&.4&.5\end{bmatrix}$.
So, firstly, we find the eigenvalues of this matrix. These are $\lambda$ = 0, .9. However, after that, I have no idea what to do, mainly because to find stability, you need vectors in the form of $a \pm bi$. Is this system thus unstable? Can somebody help me?