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Page history last edited by Kristen Fouss 12 years ago

Links For The Determinant of a Square Matrix


Go here and here




What is a Matrix?


A Matrix is a rectangular array of numbers organized by rows X columns.


     This matrix, for example, is a 2X3.


So, what is a Square Matrix?


A Square Matrix is the same number of rows and columns.

So this Matrix is a Square Matrix because it's a 3X3.  The Matrix has the same number of rows as it does columns!!!!


So, what is a Determinant?


A Determinant is a number associated with a Square Matrix.  Determinants are used to find inverses of matrices, to find areas of triangles, and to determine if a set of points are collinear.




To find the Determinant of a 2X2:




                                                                                                    The straight lines around the matrix indictate the need for a Determinant.

So, ad-bc equals the Determinant of Matrix A.






To find the determinant of a 3 x 3: 





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