in Linear Algebra retagged by
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Consider a $2\times2$ sqaure matrix $$\textbf{A}= \begin{bmatrix} \sigma &x\\ \omega &\sigma \end{bmatrix},$$ where $x$ is unknown. If the eigen values of the matrix $\textbf{A}$ are $(\sigma + j\omega)$ and $(\sigma - j\omega)$, then $x$ is equal to

  1. $+j\omega$
  2. $-j\omega$
  3. $+\omega$
  4. $-\omega$
in Linear Algebra retagged by
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