How to invert a matrix




Lets invert the matrix: 
 
1- Press 1/X or type
INV ( [ 2 , 3 ] [ 4 , 5 ] )
 
                
2- Press [ ENTER ]
 
3- it will show the inverse matrix
 
Remember the "," between numbers.
Here coma is used as separator, not as fraction mark.
HP49G uses "." as fraction mark, according to the
default flag.