A) 2
B) 3
C) -1
D) -2
Correct Answer: D
Solution :
\[\left| \,\begin{matrix} 3 & -1 & -2 \\ 5 & a & -3 \\ 2 & 1 & -3 \\ \end{matrix}\, \right|=0\] Þ \[3(-3a+3)+1(-15+6)-2(5-2a)=0\] Þ \[a=-2\].
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