Question: Solve the linear system (mathbf{A x}=mathbf{b}) by using Gauss elimination. (mathbf{A}=left[begin{array}{ccc}2 & 2 & -1 3 & 1 & 4 -1 & 2

Solve the linear system $\mathbf{A x}=\mathbf{b}$ by using Gauss elimination.

$\mathbf{A}=\left[\begin{array}{ccc}2 & 2 & -1 \\ 3 & 1 & 4 \\ -1 & 2 & 5\end{array}\right], \mathbf{b}=\left\{\begin{array}{c}1 \\ -2 \\ -8\end{array}\right\}$

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