Given that A = \(\left[ {\begin{array}{*{20}{c}} \alpha &\beta \\ \gamma &{ - \alpha } \end{array}} \right]\) and A2 = 3I, then :

1
1 + α2 + βγ = 0
2
1 - α2 - βγ = 0
3
3 - α2 - βγ = 0
4
3 + α2 + βγ = 0

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