MCQ
$\left|\begin{array}{cc}x & 2 \\ 18 & x\end{array}\right|=\left|\begin{array}{cc}6 & 2 \\ 18 & 6\end{array}\right|$
  • A
    6
  • $\pm 6$
  • C
    -6
  • D
    $0$

Answer

Correct option: B.
$\pm 6$
B

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