X 2 -x x-1 x-2 x 2 -3x-1 3x 3x-3 x 2 -2x-3 2x-1 2x-1 -Ax-B where A and B are determinants of order 3- Then A-2B is equal to

→ C_ 1 → C_ 1 C_ 2 C_ 3 C_ 3 C_ 2 = x^ 2 1 amp; x+1 amp; 1 x^ 2 1 amp; 3x amp; 3 x^ 2 +4 amp; 2x 1 amp; 0 = ...

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Inverse of a Matrix

x 2 +x x+1 ...

Question

$∣ ∣ ∣ ∣ ∣ \begin{matrix} x^{2} + x & x + 1 & x + 2 x^{2} + 3 x - 1 & 3 x & 3 x - 3 x^{2} + 2 x + 3 & 2 x - 1 & 2 x - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣ = A x + B$ where $A$ and $B$ are determinants of order $3$ . Then $A + 2 B$ is equal to

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∣ ∣ ∣ ∣ ∣ \begin{matrix} x^{2} + x & x + 1 & x - 2 2 x^{2} + 3 x - 1 & 3 x & 3 x - 3 x^{2} + 2 x + 3 & 2 x - 1 & 2 x - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣ = x A + B

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∣ ∣ ∣ ∣ ∣ \begin{matrix} x^{2} + x & x + 1 & x - 2 2 x^{2} + 3 x - 1 & 3 x & 3 x - 3 x^{2} + 2 x + 3 & 2 x - 1 & 2 x - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣

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∣ ∣ ∣ ∣ ∣ \begin{matrix} x^{2} + x & x + 1 & x - 2 2 x^{2} + 3 x - 1 & 3 x & 3 x - 3 x^{2} + 2 x + 3 & 2 x - 1 & 2 x - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣

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∣ ∣ ∣ ∣ ∣ \begin{matrix} x^{2} + x & x + 1 & x - 2 {2 x}^{2} + 3 x - 1 & 3 x & 3 x - 3 x^{2} + 2 x + 3 & 2 x - 1 & 2 x - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣ = a x - 12,

a^{2}

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