SOLUTION: Let P = [3 -1] [8 6 ] Determine the inverse of P I am really not sure how to go about this. THANK YOU

Question 1001640: Let
P =
[3 -1]
[8 6 ]
Determine the inverse of P
I am really not sure how to go about this.
THANK YOU
Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!



1. Find the determinant of the matrix: (3)(6)-(-1)(8) = 18+8 = 26

2. Swap the upper left and lower right elements:
 

3. Change the signs of the other two elements (upper right
   and lower left:



4. Divide every element by the number obtained in step 1.



Reduce the reducible fractions:



The above method only works for finding the inverse of
2x2 matrices.

Edwin

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