TI-84 Tutorial – Augmented Matrices, Reduced Row-Echelon Form, and Solving for Multiple Variables
Posted by: raysmithtx Post date: July 12th, 2011
This video involves some more advanced steps for working with matrices on a TI-84 calculator. In this video, I actually take a system of 4 equations with 4 variables and show you how to solve for all four variables without writing a single thing down. To do this, you have to know how to create an augmented matrix and put it in REDUCED Row-Echelon Form. You may want to watch the more basic video (how to convert a matrix to row-echelon form) before watching this one, because I gloss over some of the basic steps in this video.
July 12th, 2011 at 1:40 pm
Awesome tutorial! Thanks for keeping it simple!!
July 12th, 2011 at 2:09 pm
@aikea27 if you have requests just let me know
July 12th, 2011 at 2:11 pm
Awesome vid appreciate it man. More if you can.
July 12th, 2011 at 3:01 pm
you saved my life for my test tomorrow!!!!!! i had no idea what i was doing thanx sosososososo muchh
July 12th, 2011 at 3:52 pm
@McFacecriminal: Just a warning…you don’t always get the correct answer when you do it that way. Sometimes it works, sometimes it doesn’t. I’m sure there’s a reason for it, but I just haven’t sat down and tried to figure out why this is the case. (When it works, though, you’re right – it’s much quicker and easier.)
July 12th, 2011 at 4:04 pm
actually an easier way is to plug the matrix in at the beginning as a 4 x 5. (Pretend the dashed line is gone.)
Hit rref:. Plug in A. it gives the same answer in a gazillion less steps
July 12th, 2011 at 4:49 pm
this helped a lot once i turned the volume up all the way
Thank you!!
July 12th, 2011 at 5:31 pm
thanks
July 12th, 2011 at 5:59 pm
Thank You very much! This was a life saver and a grade booster!!!
July 12th, 2011 at 6:41 pm
I love you so freaking much. This helped me finish my math for summer school completely. This was the last thing I needed because I couldn’t figure it out doing it by hand. THANK YOU! You ish god!*bows*
July 12th, 2011 at 7:36 pm
The explanation is clear and well presented. It helped me a lot studying for my finite math final. Volume though needs adjustment it is too low. Otherwise great video, Thanks!
July 12th, 2011 at 8:24 pm
Just wanted to let you know, even with my computer’s volume and youtube’s volume set at its highest level, you cannot be heard.