Mathematics: College work! use the matrices and a calculator to solve the system of equations. -3x+y=-2 x+y=-6

College work! use the matrices and a calculator

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jolancunningham

02.01.2022

$\begin{cases}-3x+y=-2\\x+y=-6\end{cases}\iff\begin{bmatrix}-3&1\\1&1\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-2\\-6\end{bmatrix}$

$\implies\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-3&1\\1&1\end{bmatrix}^{-1}\begin{bmatrix}-2\\-6\end{bmatrix}=\begin{bmatrix}-1\\-5\end{bmatrix}$

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laniiawesomee

23.01.2022

Mathematics

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College work! use the matrices and a calculator to solve the system of equations. -3x+y=-2 x+y=-6

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