Ononot — Let A be a 2 \times 2 matrix with eigenvalues 1 and 2. If B

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Eigenvalues & Eigenvectorshard

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Let $A$ be a $2 \times 2$ matrix with eigenvalues $1$ and $2$ . If $B = A^2 - 3A + 2I$ , what are the eigenvalues of $B$ ?