If \[M=\left[ \begin{matrix} 1 & 2 \\ 2 & 3 \\ \end{matrix} \right]\]and \[{{M}^{2}}-\lambda M-{{I}_{2}}=0\], then \[\lambda =\] [MP PET 1990, 2001]

If \[M=\left[ \begin{matrix} 1 & 2 \\ 2 & 3 \\ \end{matrix} \right]\

1.	If \[M=\left[ \begin{matrix} 1 & 2 \\ 2 & 3 \\ \end{matrix} \right]\]and \[{{M}^{2}}-\lambda M-{{I}_{2}}=0\], then \[\lambda =\] [MP PET 1990, 2001]
A.	-2
B.	2
C.	-4
D.	4
Answer» E.

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If \[M=\left[ \begin{matrix} 1 & 2 \\ 2 & 3 \\ \end{matrix} \right]\]and \[{{M}^{2}}-\lambda M-{{I}_{2}}=0\], then \[\lambda =\] [MP PET 1990, 2001]

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