Matrices+and+the+Graphing+Calculator

EXAMPLE: A= [2 1] B= [2] C= [1 2 4] [3 7] [1] [-1 -2 5]

These are the steps to putting these matrices into a Graphing Calculator :

You should see something like this:
 * 1.** Click the "2nd" button following with the matrix button "x - 1"


 * Helpful tip:** Your dimensions may differ from the ones shown.

You should see the same picture as above.
 * 2.** To enter your matrices, push your right arrow button two times over to, "EDIT".

"B" goes with two, "C" goes with three, and so on.
 * Helpful tip:** As you can see in the picture, "A" goes with one,

You should see something like this:
 * 3.** To type in "A" click "1'.



It has two rows and two columns. So where it says "2x3" the 2 should be blinking so push two for that. Then push the arrow to the right to the next number and push three.
 * 4.** Now you will need to figure out what dimensions matrix "A" is.


 * 5.** When you have the dimension in, click your down arrow and your ready to push the entries in.

Keep doing that for the rest of the numbers. Your calculator should look EXACTLY like this :
 * 6.** To push the entries in, click the first entry in "A", (which is "2"), then click "ENTER".



NOW YOU HAVE MATRICE "A"


 * 7.** To finish with "A", click "2nd", then "MODE" on calculator.


 * For "B" and "C", follow the same steps as "A" but with the right entries and dimensions!


 * "B" SHOULD BE THIS :



"C" SHOULD BE THIS :

**

EXAMPLES :


 * 1. A X C**
 * Click "2nd" then "Mode". Click "1" for "A". If needed, click "ENTER". You should see this :



2. Do the same for "C" by going through the same instructions. You should see :



3. Click "ENTER" and there is your quick answer to A X C !

IMPORTANT TIP ! : If you see this while trying to solve an equation, that means the dimensions of each one __cannot__ join together :



AND THIS IS HOW YOU SOLVE MATRICES IN A GRAPHING CALCULATOR ! (=