For the semidefinite matrices A = 2 1 1 1 2 1 1 1 2 (rank 2) and B = 1 1 1 1 1 1 1 1 1
Chapter 6, Problem 6.2.31(choose chapter or problem)
For the semidefinite matrices A = 2 1 1 1 2 1 1 1 2 (rank 2) and B = 1 1 1 1 1 1 1 1 1 (rank 1), write x TAx as a sum of two squares and x TBx as one square.
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