1:Find the determinant of the following mattrix \(\displaystyle{\left[\begin{matrix}\begin{matrix}{2}&-{1}&-{6}\end{matrix}\\\begin{matrix}-{3}&{0}&{5}\end{matrix}\\\begin{matrix}{4}&{3}&{0}\end{matrix}\end{matrix}\right]}\)

2: If told that matrix A is singular Matrix find the possible value(s) for x \(\displaystyle{A}={\left\lbrace\begin{matrix}{16}{x}&{4}{x}\\{x}&{9} \end{matrix}\right.}\)