Mathematics, 23.11.2020 22:20 fonsworth5
Use a matrix equation to solve the system of linear equations. left brace Start 2 By 1 Matrix 1st Row 1st Column 2nd Row 1st Column EndMatrix x plus 2 y equals 8 nbsp 2 x plus 6 y equals 9 What is the inverse matrix?
Answers: 3
![\left[\begin{array}{ccc}3&-1&\\-1&1/2\\\end{array}\right]](/tpl/images/0924/3194/83fc8.png)
![\left[\begin{array}{ccc}1&2&\\2&6\\\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}8\\9\end{array}\right]](/tpl/images/0924/3194/2c5db.png)
= (1 / determinant of A) x Adjoint of A![\left[\begin{array}{ccc}6&-2&\\-2&1\\\end{array}\right]](/tpl/images/0924/3194/4d0b3.png)
![\frac{1}{2} \left[\begin{array}{ccc}6&-2\\-2&1\end{array}\right]](/tpl/images/0924/3194/2a845.png)
= 
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Use a matrix equation to solve the system of linear equations. left brace Start 2 By 1 Matrix 1st Ro...
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