The matrix \[A=\left[ \begin{matrix} 1 & 3 & 2 \\ 1 & x-1 & 1 \\ 2 & 7 & x-3 \\ \end{matrix} \right]\] will have inverse for every real number x except for

The matrix \[A=\left[ \begin{matrix} 1 & 3 & 2 \\ 1 & x-1

1.	The matrix \[A=\left[ \begin{matrix} 1 & 3 & 2 \\ 1 & x-1 & 1 \\ 2 & 7 & x-3 \\ \end{matrix} \right]\] will have inverse for every real number x except for
A.	\[x=\frac{11\pm \sqrt{5}}{2}\]
B.	\[x=\frac{9\pm \sqrt{5}}{2}\]
C.	\[x=\frac{11\pm \sqrt{3}}{2}\]
D.	\[x=\frac{9\pm \sqrt{3}}{2}\]
Answer» B. \[x=\frac{9\pm \sqrt{5}}{2}\]

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The matrix \[A=\left[ \begin{matrix} 1 & 3 & 2 \\ 1 & x-1 & 1 \\ 2 & 7 & x-3 \\ \end{matrix} \right]\] will have inverse for every real number x except for

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