SOLUTION: how do you slove a 3 by 3 matrices that deals with cofactors? My problem: {{{(matrix(4,4,2, 3, -1, 4, 0, 5, -2, 1, 3, 1, 2, -1, 1, 2, 0, 3))}}}

Algebra ->  Matrices-and-determiminant -> SOLUTION: how do you slove a 3 by 3 matrices that deals with cofactors? My problem: {{{(matrix(4,4,2, 3, -1, 4, 0, 5, -2, 1, 3, 1, 2, -1, 1, 2, 0, 3))}}}       Log On


   



Question 148324: how do you slove a 3 by 3 matrices that deals with cofactors?
My problem:


Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

How do you solve a 3 by 3 matrices that deals with cofactors?

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Go to this site and see exactly how one forms the inverse of
a 3x3 matrix using the minor-cofactor-adjoint method:

http://www.easycalculation.com/matrix/inverse-matrix-tutorial.php

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My problem:
 

This is a 4x4, not a 3x3.  It would be very long and difficult to find
the inverse of this 4x4 matrix by the the minor-cofactor-adjoint method.
But here is the inverse of the 4x4 matrix above:

  

Edwin