Ortogonally diagonalize the given matrix A, giving the diagonal matrix D and the diagonalizing orthogonal matrix P.
Find the eigenvalues using charactreistic polynomial For
[tex](-3I_3-A)=\left[ {\begin{array}{ccc}
-2 & -2 & -2 \\
-2 & -2 & -2 \\
-2 & -2 & -2 \\
\end{array} } \right]
\]
so this means the eigenvector is
for
so the eigvenvector for is (again)
I can't diagonalize a matrix with only one eigenvector, where am I going wrong?