If AAA is a skew-symmetric 3×33 \times 33×3 matrix, what is its minimal polynomial m(λ)m(\lambda)m(λ)?
λ3+cλ\lambda^3 + c\lambdaλ3+cλ
λ3+c\lambda^3 + cλ3+c
λ2+c\lambda^2 + cλ2+c
λ3−λ\lambda^3 - \lambdaλ3−λ