Question
Given $A =\left[\begin{array}{ll}x & 3 \\ y & 3\end{array}\right]$
If $A ^2=3 I$, where $I$ is the identity matrix of order 2 , find $x$ and $y$.
If $A ^2=3 I$, where $I$ is the identity matrix of order 2 , find $x$ and $y$.
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Answer
Self
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