Find the values of $x$,if $\left|\begin{array}{ll}2 & 4 \\ 5 & 1\end{array}\right|=\left|\begin{array}{cc}2x & 4 \\ 6 & x\end{array}\right|$.

  • A
    $x=\pm \sqrt{2}$
  • B
    $x=\pm \sqrt{7}$
  • C
    $x=\pm \sqrt{6}$
  • D
    $x=\pm \sqrt{3}$

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