A is skew-symmetric: A=0c−b−c0ab−a0.
From A1−10=332: c=3, a+b=−2.
From A21−10=−319−24: b=3, a=−5.
A+I=13−3−31−5351, det(A+I)=44.
For 3×3 matrix: det(adj(M))=(detM)2.
det(2adj(A+I))=8⋅442=8⋅1936=15488=27⋅112.
det(adj(2adj(A+I)))=154882=214⋅114.
α=14, β=0, γ=4. α+β+γ=18.