Question

Evaluate determinant of Matrix A= ​

Answer 1

Answer:

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Step-by-step explanation:

The determinant of a 2×2 matrix is det $\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]$ =a⋅d−b⋅c

det. $\left[\begin{array}{ccc}1&-2\\4&5\end{array}\right]$ =(1)⋅(5) - (-2)⋅(4) = 13