- #1

GregoryGr

- 41

- 0

## Homework Statement

Calculate the eigenvalues and eigenvectors of the matrix:

$$ A= \begin{bmatrix}

3 & 2 & 2 &-4 \\

2 & 3 & 2 &-1 \\

1 & 1 & 2 &-1 \\

2 & 2 & 2 &-1

\end{bmatrix} $$

## Homework Equations

nothing

## The Attempt at a Solution

I've found the eigenvalues, but what disturbes me, is that I can't find a way to make the determinant triangular, as to find the values faster. Can anybody see a way to do that?