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![Show all work and simplify your answers.
1. Let \( A=\left[\begin{array}{ccc}8 & 3 & -4 \\ 5 & 1 & 2\end{array}\right] \) and](https://media.cheggcdn.com/study/b7e/b7e8a11b-2a6c-44d2-a812-54a76e28c0c5/image)
Expert Answer
Given the matrix isA=[83?4512],b?=[12?1]Ab