What is the characteristic equation of A=(1002)A = \begin{pmatrix} 1 & 0 \\ 0 & 2 \end{pmatrix}A=(1002)?
λ2−3λ+2=0\lambda^2 - 3\lambda + 2 = 0λ2−3λ+2=0
λ2+3λ+2=0\lambda^2 + 3\lambda + 2 = 0λ2+3λ+2=0
λ2−2=0\lambda^2 - 2 = 0λ2−2=0
λ2−3λ−2=0\lambda^2 - 3\lambda - 2 = 0λ2−3λ−2=0