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