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Questions  >>  CBSE XII  >>  Math  >>  Matrices
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Does $A=\begin{bmatrix}5 & 3\\1 & 2\end{bmatrix}$ satisfy the equation $\;A^2-3A-7I=0$ and hence find $\;A^{-1}$

$\begin{array}{1 1} No, \;it\; does\; not; A^{-1}=-1/7\begin{bmatrix}-2 & -1 \\1 & 5\end{bmatrix} \\ Yes \;it \;does; A^{-1}=-1/7\begin{bmatrix}-2 & -3 \\1 & 5\end{bmatrix} \\ Yes\; it\; does; A^{-1}=-1/14\begin{bmatrix}-2 & -3 \\1 & 5\end{bmatrix} \\ No \;it\; does\; not; A^{-1}=-1/7\begin{bmatrix}-2 & -3 \\1 & 5\end{bmatrix} \end{array} $

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