Show That the Matrix Has No Inverse $$\mathrm { A } = \left[ \begin{array} { r r } 14 & - 6 \\- 7 & 3\end{array} \right]$$

Show that the matrix has no inverse.
- $$\mathrm { A } = \left[ \begin{array} { r r } 14 & - 6 \\- 7 & 3\end{array} \right]$$