SOLUTION: Solve for Matrix X: {{{(matrix(2,2,-3,-14,2,9))X=(matrix(2,2,8,-4,0,-4))}}}

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Question 173474: Solve for Matrix X:
Answer by Edwin McCravy(20086)   (Show Source): You can put this solution on YOUR website!




First find the inverse of  by

1. find the determinant 



2. Swap the elements is the upper left to lower right diagonal.
   Change the signs in the other diagonal.




3. Divide the matrix through by the determinant

 

That is the inverse matrix. So left-multiply both sides
of the original equation by this inverse:










Edwin
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