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    %% Characteristic Polynomial from Eigenvalues
% Calculate the eigenvalues of a matrix, |A|.

% Copyright 2015 The MathWorks, Inc.

A = [1 8 -10; -4 2 4; -5 2 8]

%%
%
e = eig(A)

%%
% Since the eigenvalues in |e| are the roots of the characteristic
% polynomial of |A|, use |poly| to determine the characteristic polynomial
% from the values in |e|.
p = poly(e)