Ononot — Let A be a 2 \times 2 matrix with eigenvalues \lambda1 = 3+4

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Eigenvalues & Eigenvectorshard

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Let $A$ be a $2 \times 2$ matrix with eigenvalues $\lambda_1 = 3+4i, \lambda_2 = 3-4i$ . What is the value of $\text{tr}(A^2)$ ?