I can't transform this matrix of lambda-matrix techniques. I don't know this method, but I should use this method for solve. Eigenvalues equal to "-1". Guys, help me, please.
$$A=\left(\begin{array}{ccc}0 &1 &-1 \\ -3 &-4& 3 \\ -2 &-2& 1\end{array}\right)$$