How do i solve a matric problem with a TI- 83+

Hello,
You should try to use the correct heading.
Press [2nd][Matrix] right arrow to [EDIT][ENTER] to create the [A]
matrix. Exemple of a 3x3 Matrix [A].




Once the matrix [A] is created you press [2nd][MATRIX] -->[MATH]

You can add similar matrices, you can multiply matrices, subbtract them, raise a matrix to a power, extract the square root, etc...

Here are the other operations you can pefrorm on matrices. Sorry I cannot go into the detail of things;A minimun of theory is needed to be able to use the commands.