Question:
If $A=\left(\begin{array}{ll}3 & 1 \\ 7 & 5\end{array}\right)$ and $A^{2}+x \mid=y A$ then the values of $x$ and $y$ are
A. $X=6, y=6$
B. $X=8, y=8$
C. $x=5, y=8$
D. $x=6, y=8$
Solution:
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