What is the characteristic equation of the matrix (4123)\begin{pmatrix} 4 & 1 \\ 2 & 3 \end{pmatrix}(4213)?
λ2−7λ+10=0\lambda^2 - 7\lambda + 10 = 0λ2−7λ+10=0
λ2+7λ+10=0\lambda^2 + 7\lambda + 10 = 0λ2+7λ+10=0
λ2−7λ−10=0\lambda^2 - 7\lambda - 10 = 0λ2−7λ−10=0
λ2+7λ−10=0\lambda^2 + 7\lambda - 10 = 0λ2+7λ−10=0