[Steps Shown] Determine a least squares solution to
Question: Determine a least squares solution to
\[\left[\begin{array}{cc} 1 & 2 \\ 2 & -1 \\ -1 & 3 \\ 1 & 1 \end{array}\right]\left[\begin{array}{l} x_{1} \\ x_{2} \end{array}\right]=\left[\begin{array}{l} 1 \\ 1 \\ 1 \\ 1 \end{array}\right]\]
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