$A$ and $B$ are $3 \times 3$ matrices such that $AB + A + B = 0$,then:

  • A
    $(A + B)^2 = A^2 + 2AB + B^2$
  • B
    $|A| = |B|$
  • C
    $A^2 = B^2$
  • D
    None of these

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