9. If the adjoint of a 3*3 matrix p is (144 217

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P = ∣ ∣ ∣ ∣ \begin{matrix} 1 & α & 3 1 & 3 & 3 2 & 4 & 4 \end{matrix} ∣ ∣ ∣ ∣

3 \times 3

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P = ∣ ∣ ∣ ∣ \begin{matrix} 1 & α & 3 1 & 3 & 3 2 & 4 & 4 \end{matrix} ∣ ∣ ∣ ∣

3 \times 3

α

3 \times 3

⎡ ⎢ ⎣ \begin{matrix} 1 & 4 & 4 2 & 1 & 7 1 & 1 & 3 \end{matrix} ⎤ ⎥ ⎦

P = ⎡ ⎢ ⎣ \begin{matrix} 1 & α & 3 1 & 3 & 3 2 & 4 & 4 \end{matrix} ⎤ ⎥ ⎦

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| A | = 4

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If P = $⎛ ⎜ ⎝ \begin{matrix} 1 & \propto & 3 1 & 3 & 3 2 & 4 & 4 \end{matrix} ⎞ ⎟ ⎠$ is the adjoint of a 3x3 matrix A and det(A)=4,then α is equal to

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