Question: ??????? (a) Let ( A=left[begin{array}{cc}0 & 1 1 & -3end{array} ight] ). Find all ( 2 times 2 ) matrices ( B ) which

??????? (a) Let $ A=\left[\begin{array}{cc}0 & 1 \\ 1 & -3\end{array}\right] $. Find all $ 2 \times 2 $ matrices $ B $ which satisfy the relation $ A B=B A $. (b) Use row reduction and back-substituti 2 answers

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