Solving a System of Linear Equations Using Inverses

[oscardelgado-major]

15 years ago and still a quality and concise video, thank you mate

[johnbravo]

Oh thank god for this video. Literally saved me from failing and retaking a class.

[fashionbeauty]

I like youtube much more than my class lectures lol

[XxGreenBeXx]

You saved my life good sir. I couldn't make it to the lecture where the professor explained this a while ago and was completely lost on it and now it's coming back to me for finals!

[SuspendedSwish]

That was truly helpful. I needed help urgently, and I'm glad I found this video. Thank you so much!

[TheAutumnWinter]

OH MY GOD! I finally get this after my teacher refused to show me the steps (for the tenth time) She obviously didn't explain it in a way I could comprehend. I'm taking a midterm tomorrow, and I'm saved! THANK YOU!!! Your method is so much simpler! My teacher told me to multiply the actual inverse (A-1) times the determinant and then multiply by the solution matrix. Thank God I found this in time.

[seans]

wow, wish my prof had mentioned any of this lol, never mentioned you could calculate the inverse that easily, let alone how to solve a system of equations using the inverse. THANK YOU, this clarifies so much!!!!

[janicegrant]

isn't the 5 and 1 suppose to become negative after switching them to the invers form???

[patrickjmt]

thanks! normally i have the hand writing of a first grader, but i try to make this stuff legible!!

[BlademanZX]

Yeah, you use a graphic calculator like the TI-84. you hit 2nd, then you hit the X^-1 button. That allows you to input matricies. Once you've put in the matricies, then you can use the X^-1 button to find it's inverse. If it's a decimal as it often is, hit Math, then hit Frac, then hit enter

[danzard_]

even though this video is 15years old it has helped me with my elementary linear algebra homework. Thank you🎉

[ravikhaniyo]

your videos helped me a lot for the preparation of my finals

[bc]

What is the I*x in simplifying Ax=B? What does that I represent is more so what I'm asking? Anyone?

[patrickjmt]

happy it helped.
hang in there! you will be fine

[onlinetuna]

you're a life saver man! i've got an exam on this tomorrow at the University of Canterbury in New Zealand. You don't get paid nearly enough to do this! i.e $0<<enough

[ferdre]

wait! how come you dint use the negative eleven when multiplying the second equation

[redshadow]

as a junior maths addict. I thank you for your lesson. Keep up the good work. I would like to see some videos for Vectors basic to advance. thanks
great job.

[megancasutt]

Thank you for making this video. This actually makes sense! I had a mental breakdown just before this.

[ChandlerRahl]

I skipped 4 classes in a row because my math teacher blows. His entire teaching set up is terrible and he spends half the class ridiculing the students because they don't know how to do something he has yet to teach.
Keep it up Pat. I passed my 1050 final with your help.

[Raymondlk]

I am so grateful, God, thank you for this wonderful gift you've sent to us!