Editing DeterminantOfAMatrix
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The determinant of a matrix *M* is written as either EQN:|{\bf~M}| or det( *M* ). * The determinant of a 2x2 matrix is the /area/ scale-factor. * The determinant of a 3x3 matrix is the /volume/ scale-factor. The determinant of a 2x2 matrix EQN:\left[\begin{matrix}a&b\\c&d\end{matrix}\right] is EQN:\left|\begin{matrix}a&b\\c&d\end{matrix}\right|=ad-bc Determinants can be used to find the vector cross product. ---- * See also Matrices