Scilab - Check if x or y are eigenvectors of matrix A.

Check if x or y are eigenvectors of matrix A.

Check if x or y are eigenvectors of matrix A. Then calculate the associated eigenvalue.
is the following code is right?

A = [2,1,1;2,3,2;1,1,2]
X = [-1;1;0]
eigs(A)
z = A*X
LAMDA = z*inv(X)

You may want to verify it by hand calculation. The scilab command to find eigen values of the given martix is "spec".