If λ\lambdaλ is an eigenvalue of AAA, what is an eigenvalue of A2+2A+IA^2 + 2A + IA2+2A+I?
λ2+2λ+1\lambda^2 + 2\lambda + 1λ2+2λ+1
(λ+1)2(\lambda + 1)^2(λ+1)2
λ2+2\lambda^2 + 2λ2+2
λ+1\lambda + 1λ+1