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Eigenvalues & Eigenvectorseasy
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For a 2×22 \times 22×2 matrix AAA, if the characteristic equation is det⁡(A−λI)=λ2−5λ+6=0\det(A - \lambda I) = \lambda^2 - 5\lambda + 6 = 0det(A−λI)=λ2−5λ+6=0, what is the sum of the eigenvalues?