There are two or actually three ways to multiply matrices if you include the use of a calculator. One being multiplying rows and columns, two being the way it's shown in the notes, and three being simply the use of a calculator.
To multiply matrices in a ti-84 calculator, first go to 2nd then press x^-1 then arrow to the right to edit and then press enter. Enter the dimensions of the first matrix and then enter the inner numbers.
After that is done press 2nd then mode and repeat the previous steps for the second matrix.
Now press 2nd then x^-1 then press enter. Press the multiplication symbol and then press 2nd then x^-1 move down to matrix B and then press enter and enter once more to get the product.
- Parrish Masters
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