Matrix Operations on the TI-83+ TI-84+ 

Holy crap I've had this old sucker for five years and I barely learned how to matrix on it, thanks!

This is great! I think a lot of students will benefit from this tutorial.

You just helped me with my midterms tremendously! Thank you so much! I shared this video with my classmates! :)

As a teacher, I've seen it plenty. Students think the TI calculator should "just know" what you mean the same way that iPhone "magically" corrects your texting spelling mistakes. The negative symbol and subtraction symbol just confuse some people...

5:20 - solving system with three variables. Thanks for the tutorial. Good stuff.

I was trying to solve a system on math xl for over an hour and was never getting the exact decimal answer until I did it the way you suggested. Thanks for sharing it.

i have a freakin TBI and you rock; i've spent 4 weeks working on how to find the augmented matricies; THANK YOU

Yes, that's a confusing thing, I agree. To delete a matrix, you actually go into the "MEM" (memory) menu and go into #2, "Mem Mgmt / Del..." then choose #5 matrix and you will see a listing of all your matrices. Select, and press the DEL key to delete.

Great video Andrew. You explained this concept so much easier and more clearly than my math text book did. Thanks.

Thank you!!! Super helpful! I just spent 4 hours on the same homework problem and no matter what I do I cannot master the Gauss-Jordan elimination method for solving equations in matrices. This is sooo much simpler! Any as for whoever made fun of you for differentiating between the minus and the negative keys, I spent a week thinking I had a defective calculator because I couldn't get a valid line graph function because I was using the minus key instead of the negative. Very Helpful!

awesome----u really know how to teach-----pls more of every thing!!!

just tried to do this on paper for a good hour DX. You're a king

12 years later and I’m still using this

Thank you so much! My math teacher has a very weird way of solving it that requires excessive writing and steps. This helps sooo much.

You just restored my faith in humanity, thank you sir.

oh my goodness! you just saved me soooo much time and stress. Like you probably will never know how much you helped me for my math quiz and test. thank you =D Did it very well btw.

I am forever learning new things on my TI84+, thank you for the rgreat vid.

That was Great!!! Been trying to figure this out for 2 weeks! learned in 10 mins!! Thank you so much!

Awesome explanation, very clear and immensely helpful! Thanks!

Thank you i just came back from doing a test and id like to thank you for this video it really helped alot!

Thank you for this video, I am not very good at algebra so I try to find alternative ways on my calculator and most of your videos help me a bunch

Thank you for explaining in 10 minutes what my professor failed to explain in 5 videos.

So much easier to understand than my math professor! Thank you so much!!

Thank you so much. Your a blessing!!!! Can not understand my math instructor. So glad you shared this....

Thank you a lot Andrew Borne. May God bless you abundantly.

omg i can finally do chapter 5 in my math book the easy way!! my lame professor didn't know how to even work it on calculator so he made us do it the hard way O_O all he said was if we know how to do it on the calc to go ahead on the test it would be okay -.- YOU ARE A LIFE SAVER SIR!!

Thank you so much for posting this!! Very clear and easy to understand!!!

So helpful! This is going to make my math midterm so much easier! Thanks for sharing.

Concise and clear, thank you very much!

Thanks g saved me some time on my test!

You're welcome. Since I'm answering a year after your comment, I hope all went well and you passed your class! -Mr. Borne

THANK YOU! I was literally about to smash my calculator with a hammer.

Thanks for the video, it really helped.

Omg.. You just helped me a lot in my math homework. :O Thanks & keep up the great work!

Very nice work. Thank you!!

Thanks for the video, but there were some steps where you were just quickly pressing buttons without explanation. This made it a little hard to follow at times.

thnx for making this video, greatly appreciated, got stuck on my hw man

Thank you so much you saved me so much time

Thank you very much from Japan.

Awesome, this has been a great help!!! Thank you Andy!!! :)

Thank you very much ! you helped me out with this video

Thank you soooo much. You dont even know whow much you helped me! Me, a french student ! :)

+Adventurer2511 Sorry, the TI-30XS Multiview can do some TABLES stuff (great for statistics, and cheap) but not matrices. :(

You saved my life. THANK YOU!!!

Thanks for the help. It helped a lot :) Very easy to follow!

Sort of. You would have to write a program to do formula operations, which DOES take work, but it is the enter-once-do-many-times kind of thing you're looking for. I will soon have a program posted that can do determinants and inverses and great stuff like that.

thanks a ton man, really helped me out in class

You are a life saver!!

When you show people how to solve the systems of equation around the 5:50 mark, instead of having a 3 X3 matrix and then 3X1 matrix, you could've just created a 3X4 matrix and just throw in all the coefficients of all the terms and your 4th column would've been the constants of the equation. Then you could've used rref(A) and it would give it to you. It's still a good vid with all the other info.

Very Clear. Good Job!!

OH MY GOSHHHHHHH!!!! Thank you so much! This video helped me so much! I figured out my 10 points extra credit! YAY! :D

having issues with imaginary numbers in the matrices.. will it not work? long hand algebra during a EE test is no bueno..

Great , helped me a wicked lot.

Thank you very much, you are a good teacher!

Desde Argentina: Muchas Gracias! Es de utilidad.

nice video! you can also use Linear Algebra Toolkit and it will show u how to work the problems step by step!!! :)

I finally understand this! thanks!

That error message results when you try to take an inverse of a matrix which has a determinant of zero, which you cannot do.

thanks for augment/enter key, but which key said RAM clear[good-bye, stored matrices?]

Just...excellent!!!

I really appreciate this bro

thank you sooooo much. i really appreciate it. could you also do some more videos on tricky things. thanks

this is great. thanks for sharing.

This Definetly helped ALOT!

Saved my life!!

Is it possible to enter a formula into a matrix, such that you only need to enter the matrix one time and can feed the variables new values?

I did not see what buttons you were pressing to do addition and multiplication of matrices so I am still confused...and I have a test on this on Monday and a final exam in my college algebra class on the 12th, so I need the info. Thanks!

So what if you have matrices A, B, C, and D with orders 2x3, 2x3, 3x2, and 2x2, repetitively, and are trying to find the orders of operations, such as: A(2B) D(A-3B) (BC-D)A

thank you so much. thanks for sharing it.

great video, very clear, u should go through all of the matrix math functions. :)

How can i find a determinant when the member of a matrix are complex

This was great, thank u

Hi, can I save a previous matrix result for a further operation? I'll clue you thru my problem. I have matrix A and B. First I need to mutiply A x transposed(A). Lets call the result as C. Then I have to multiply B x transposed(A). Lets call this D. Finally i need to multiply D x inverse(C). I want to now if I can store C and D in the TI memory, without having to write down the numbers and type again

What are the key strokes for storing the augmented matrix in "C"?

This is great, very helpful

Can I multiply two matrices A and B and store a result as a matrix C to use it in another calculation

Thank you sir. That was most helpful.

Thank you!! This was very helpful.

Can we enter 10x10 matrix on TI-84+ ? I want to buy it for Adjustment Computation and Error Theory and Parameter Estimation.

Thank you very much the video is very helpful.

which means that it is inconsistent right?

welp, that concludes my math homework. Thank You. All courtesy is due..

how do i multiply matrix a and matrix b but subtract matrix c on the ti-84 plus?

Thank you very much! Very helpful

I ran into a problem with using my TI-84. How do we scroll down on a matrix in the answer on the TI-84? I can only see 6 rows of my 7-row matrix. Help?

what if the last equation only has 2 terms? do you sub in 0 for the non existent term?

Can I also calculate something like f(x1,x2) = x^2-4xy+x-2xy^2+y-4 Im searching for the Hess-Matrix of A at (2 over 0). What is a11? Now do I control that ?!

Thank you so much, this video really simplified what tries to be taught in my textbook about augmented matrix. Can I use a 4*3 matrix in place of combining matrix 2 & 3 in matrix C?

how do you get the A matrix my itself? before adding it to the B?

How do you delete matrices A, B, and C after youre done? I've pressed delete and clear when under "EDIT" and "NAMES" to no avail.

Could you just enter a 3 by 4 rather than combining two?

I need help with the Pivot in given simplex tableau operation ???

Do you know if we can access to a shortcut menu for matrices on ti 84 plus? It will make things easier and faster...

Excellent, Thanks

This helps tremendously. I was trying to do this longhand and it wasn't happening!

Hey. Does anyone know how to convert the matrix values to an exact fraction? Help is appreciated.

I'm trying to solve a 3 equations 3 unknowns with fractions but it keeps on giving me 0 for the answer.

What program are you using I want to get it too

Thank you so much!

hey man umm what does it mean when i'm at the end and it goes like: " ERR: SINGULAR MAT" ? please respond iin the next 24 hours. thanks :D