What is the characteristic polynomial of the matrix (2103)\begin{pmatrix} 2 & 1 \\ 0 & 3 \end{pmatrix}(2013)?
λ2−5λ+6\lambda^2 - 5\lambda + 6λ2−5λ+6
λ2+5λ+6\lambda^2 + 5\lambda + 6λ2+5λ+6
λ2−6λ+5\lambda^2 - 6\lambda + 5λ2−6λ+5
λ2+6λ+5\lambda^2 + 6\lambda + 5λ2+6λ+5