Texas Instruments TI-83 Manual page 60

is nonsingular. Find its inverse.
SOLUTION
Enter the matrix A into your TI-83 as done in Section 11.3. Press MATRX and select
matrix [A] so it appears on the home screen as follows:
Press the inverse button on your calculator:
Inverse
-1
x
You should have the following on your home screen:
Press ENTER to obtain the result:
 
1 1 0
 
= − 
A 1 3 4

 
 
0 4 3