i could solve the polynomial but that would take forever. is there a easier way.
the polynomical i came up with is
With all of those "2"s along the diagonal, always appear in " ". When I expand it, rather tham multiplying out powers of , I left them as powers and got . Letting , that equation becomes which has solutions x= 0 (a double root), x= 1, and x= -1. Since , is a double eigenvalue, and and are also eigenvalues.