Find the values of following determinants\left| \begin{array}{cc}{-1} – InterviewSolution

1.	Find the values of following determinants\left\| \begin{array}{cc}{-1} & {7} \\ {2} & {4}\end{array}\right\| \quad \text { (2) } \left\| \begin{array}{cc}{5} & {3} \\ {-7} & {0}\end{array}\right\|
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