Let A=(23−12),then show that A2−4A+7I=O.Using this result calculat – InterviewSolution

1.	Let A=(23−12),then show that A2−4A+7I=O.Using this result calculate A3 also.
Answer» Let $A = (\begin{matrix} 2 & 3 - 1 & 2 \end{matrix})$ ,then show that $A^{2} - 4 A + 7 I = O$ .Using this result calculate $A^{3}$ also.

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