Question: A square matrix P is called an idempotent if P2 = P. Show that: If A is n x m and B is m x

A square matrix P is called an idempotent if P2 =

A square matrix P is called an idempotent if P2 = P. Show that: If A is n x m and B is m x n, and if AB = In, then BA is idempotent

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