Chapter A.3, Problem 1P

In each of Problems 1 through 10, use elementary row and column operations to simplify the task of evaluating the determinant by cofactor expansions. If $\text{A}$ is nonsingular, find ${\text{A}}^{-1}$.

$\text{A}\text{=}\left(\begin{array}{cc}1& 4\\ -2& 3\end{array}\right)$