It's hard to see the cursor, but you can tell by the x and y coordinates where it is. You can continue this process more if you want. Right arrow over to EDIT and then press the down arrow. Matrix B is presently a 1x1 matrix here. We need to make it a 3 x 3. 4.
Lets fill it with data.
Now let's fill up matrix C. 6. Now enter the data as before. You should now be back to the home screen. Then press the x -1 key. Store this into matrix A. 14.