If $A$ is a square matrix of order $3$ and $A^2+A+2I=0$,then

  • A
    $A$ can not be a skew-symmetric matrix
  • B
    $|A+I|=0$
  • C
    $A$ is non-singular and $A^{-1}=(A+I)^{-1}$
  • D
    $|A||A+I|=2$

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