If A - begin bmatrix 182 - 3 -2 - 3 -13 - 1 - 211lend bmatrix and I is a unit matrix of 3 rd order- then A2-9 I equalsA- 2 AB- 4 AC- 6 AD- None of these

The correct option is D None of theseA = [ 1 amp;2 amp;3; 2 amp;3 amp; 1; 3 amp; 1 amp; 2; ]⇒ A.A = A^2 = [ 6 amp;11 ...

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Multiplication of Matrices

If A = begin ...

Question

If $A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦$ and I is a unit matrix of $3^{r d}$ order, then
$(A^{2} + 9 I)$ equals

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None of these

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A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦

3^{r d}

(A^{2} + 9 I)

A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦

3^{r d}

(A^{2} + 9 I)

A = ⎡ ⎢ ⎣ \begin{matrix} - 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦

I

3

A^{2} + 9 I

A = [\begin{matrix} 3 & - 2 5 & 4 \end{matrix}], B = [\begin{matrix} 1 & 4 6 & - 7 \end{matrix}]

A - 4 B + 7 I

A = [\begin{matrix} 1 & - 1 2 & 3 \end{matrix}]

I

2

A^{2} - 4 A + 5

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