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Write the System of Linear Equations as a Matrix Equation [A∣B][ A \mid B ]

Question 12

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Write the system of linear equations as a matrix equation AX = B,and use Gauss-Jordan elimination on the augmented matrix [A∣B][ A \mid B ] to solve for the matrix X. {x1−3x2=−25−5x1+2x2=34\left\{ \begin{aligned}x _ { 1 } - 3 x _ { 2 } & = - 25 \\- 5 x _ { 1 } + 2 x _ { 2 } & = 34\end{aligned} \right.


A) [1−3−52][−25−4]=[347]\left[ \begin{array} { c c } 1 & - 3 \\- 5 & 2\end{array} \right] \left[ \begin{array} { c } - 25 \\- 4\end{array} \right] = \left[ \begin{array} { c } 34 \\7\end{array} \right]
B) [1−3−52]=[−2534]\left[ \begin{array} { c c } 1 & - 3 \\- 5 & 2\end{array} \right] = \left[ \begin{array} { c } - 25 \\34\end{array} \right]
C) [1−3−52][−4−25]=[734]\left[ \begin{array} { c c } 1 & - 3 \\- 5 & 2\end{array} \right] \left[ \begin{array} { c } - 4 \\- 25\end{array} \right] = \left[ \begin{array} { c } 7 \\34\end{array} \right]
D) [1−3−52][−47]=[−2534]\left[ \begin{array} { c c } 1 & - 3 \\- 5 & 2\end{array} \right] \left[ \begin{array} { c } - 4 \\7\end{array} \right] = \left[ \begin{array} { c } - 25 \\34\end{array} \right]
E) [1−3−52][−2534]=[−47]\left[ \begin{array} { c c } 1 & - 3 \\- 5 & 2\end{array} \right] \left[ \begin{array} { c } - 25 \\34\end{array} \right] = \left[ \begin{array} { c } - 4 \\7\end{array} \right]

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