1. The problem statement, all variables and given/known data 2. Relevant equations A = SDS-1 Under some specific conditions, An=SDnS-1 3. The attempt at a solution det(A-λI) = 0 (16-λ)(-λ) - (-64)(1) = 0 λ2 - 16λ + 64 = 0 λ = 8 Multiplicity 2. This is as far as I got because you need 2 eigenvalues to get 2 eigenvectors to create the S/D matrices. Is there another way to solve this, because this is the only way I learned. Also there has to be an answer for this because it is on webwork with fill in the blank answers.