Ononot — A 3 \times 3 matrix A has eigenvalues \lambda1 = 2 (algebrai

Eigenvalues & Eigenvectorsmedium

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A $3 \times 3$ matrix $A$ has eigenvalues $\lambda_1 = 2$ (algebraic multiplicity 2) and $\lambda_2 = -1$ (algebraic multiplicity 1). Which condition guarantees $A$ is diagonalizable?