Find the Value of the Second-Order Determinant $\left|\begin{array}{cc}-x^{2}+5 x & x \\ 6 & -2\end{array}\right|$

Short Answer

Find the value of the second-order determinant: $\left|\begin{array}{cc}-x^{2}+5 x & x \\ 6 & -2\end{array}\right|$