If A- - 3 0 0- 0 3 0- 0 0 3 - then A2-3A equals

The correct options are A 18 I_3 C 6A Given A=[ 3 amp; 0 amp; 0; 0 amp; 3 amp; 0; 0 amp; 0 amp; 3 ] ⇒ A=3I_3 ∴ A^2 =9I_ ...

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Singular and Non Singualar Matrices

If A= [ 3 0...

Question

If $A = ⎡ ⎢ ⎣ \begin{matrix} 3 & 0 & 0 0 & 3 & 0 0 & 0 & 3 \end{matrix} ⎤ ⎥ ⎦$ then $A^{2} + 3 A$ equals

18 I_{3}

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6 A

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12 A

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None of these

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