If A- -1 2 3- -2 3 -1- 3 1 2 - and I is the unit matrix of order 3- then A2-9I is equal to

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

Q. If

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

and

I

is the units matrix of order

2

, then

A^{2} - 4 A + 5

equals to?

Q. If

A

be a

3 \times 3

matrix and

I

be the unit matrix of that order such that

A = A^{2} + I

then

A^{- 1}

is equal to

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If A=⎡⎢⎣−123−23−1312⎤⎥⎦, and I is the unit matrix of order 3, then A2+9I is equal to

The correct option is D None of theseA=⎡⎢⎣−123−23−1312⎤⎥⎦=−1(6+1)−2(−4+3)+3(−2−9)=38A2+9I=382+9(1)=1953And 2A=76,4A=132,6A=228

If $A = ⎡ ⎢ ⎣ \begin{matrix} - 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦$ , and $I$ is the unit matrix of order $3$ , then $A^{2} + 9 I$ is equal to

The correct option is D None of these
$A = ⎡ ⎢ ⎣ \begin{matrix} - 1 & 2 & 3 - 2 & 3 & - 1 3 & 1 & 2 \end{matrix} ⎤ ⎥ ⎦ = - 1 (6 + 1) - 2 (- 4 + 3) + 3 (- 2 - 9) = 38 A^{2} + 9 I = 38^{2} + 9 (1) = 1953$
And $2 A = 76, 4 A = 132, 6 A = 228$