Question: Let 2 A = 2 13 4 13 10 4 2 Find an orthogonal matrix Q and a diagonal matrix D such that A

Let 2 A = 2 13 4 13 10 4 2 Find 

Let 2 A = 2 13 4 13 10 4 2 Find an orthogonal matrix Q and a diagonal matrix D such that A = QDQ, given that the eigenvalues of A are = 9 and i = 18.

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