Evaluate the determinant below by expanding along the first row, and give the cofactors C₁₁ and C₁₃…

For order $2$, $|A| = ad - bc$. The minor $M_{ij}$ is the determinant left after deleting row $i$ and column $j$, and the cofactor is $C_{ij} = (-1)^{i+j}M_{ij}$. The determinant is the sum of (entry times cofactor) along any row or column.