Algebra Archive: Questions from September 19, 2023
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Solve for \( x \) and \( y \) in the matrix \( A=\left[\begin{array}{cc}x & 3 \\ -5 & y\end{array}\right] \) if \( A^{2}=\left[\begin{array}{cc}-14 & 3 \\ -5 & -11\end{array}\right] \). \[ x= \] \[ y=1 answer -
(1 point) Solve \[ \begin{array}{r} x-y+z-w=1 \\ y+2 z+w=2 \\ -z+w=2 \\ -x+2 y-3 z+5 w=4 \end{array} \]1 answer -
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