If A=⎡⎢⎣122212221⎤⎥⎦ and |(A2−pA−qI)|=0, then p+q= – InterviewSolution

1.	If A=⎡⎢⎣122212221⎤⎥⎦ and \|(A2−pA−qI)\|=0, then p+q=
Answer» If $A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 2 2 & 1 & 2 2 & 2 & 1 \end{matrix} ⎤ ⎥ ⎦$ and $\| (A^{2} - p A - q I) \| = 0$ , then $p + q =$

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