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Elementary Linear Algebra
Verify that $\lambda_{i}$ is an eigenvalue of $A$ and that $x_{i}$ is a corresponding eigenvector.
$$A=\left[\begin{array}{ll}4 & -5 \\2 & -3\end{array}\right], \begin{array}{l}\lambda_{1}=-1, \mathbf{x}_{1}=(1,1) \\
\lambda_{2}=2, \mathbf{x}_{2}=(5,2)\end{array}$$