Consider this matrix that represents the discrete dynamical system $\mathbf{x}_{k+1} = D\mathbf{x}_k$:
$$D = \left[\begin{array}{cc} -1.2 &0.2\cr -1.2 &1 \end{array}\right].$$

Find the eigenvalues of $D$ and write as a comma-separated list.

Classify the origin as an attractor, repeller, or saddle point? ? attractor repeller saddle