Eigenvector acts on vector by changing both its magnitude and its direction. A matrix acts on an eigenvector by multiplying its magnitude by a factor. If the direction is unchanged and negative then it will positive and the direction will be reversed. These vectors are the eigenvectors of the matrix.
To each distinct eigenvalue of a matrix A there will be one eigenvector which are found by solving the appropriate set of homogenous equations. If λi is an Eigenvalue then the corresponding eigenvector xi is the solution of
Find the Eigenvalues of
two eigenvalues: -1, - 2