Question

What is determinant?

Answer

Determinant is an array of elements written as a square, and denoted by two vertical lines enclosing the assay. For a 2 x 2 matrix, the determinant is given by the difference between the products of the diagonal terms. For example, the determinant of
$\left[\begin{array}{cc}a& b\\ c& d\end{array}\right]=\mathrm{ad}–\mathrm{bc}$

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