Question
\text { Let } A=\left[\begin{array}{ll} 5 & 3 \\ 2 & 1 \end{array}\right] (a) Find A-1 by any method. (b) Using your answer to part(a), find a matrix X so that X A=B=\left[\begin{array}{rr} -1 & 0 \\ 1 & -8 \\ 0 & 3 \end{array}\right]
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