❖ Multiplying Matrices - Example 1 ❖

[@patrickjmt]

Hi all! Please post comments, questions and anything else on your mind in the comment section! While I try to answer as many questions as I can, there are more questions than I can answer by myself so if you are someone who might be able to help, please do so! The community is so much better when everyone is involved and helping each other out. Our strength is our willingness to help each other! Also please feel free to like or dislike the video. Your feedback is always appreciated so that hopefully I can make my future videos the best possible! Thanks and happy studies!

[@brni_iscooler]

I am like 12 years old trying to learn machine learning, and they said I need to have the knowledge of Calculus and Matrix. I was just like "what the hell is that", after going through a couple of other videos of introduction into Matrix I went on for multiplication and division, then I found your vid. It was really helpful, thanks. P.S. this channel deserves more subs P.S.P.S. english is not my main language so sorry if mistakes were made

[@RedFloweri]

How can i have the area of triangle

[@tenno5509]

im taking my GCSE o levels this year. this video helps a lot :))

[@bhikaristan69yearsagoor87]

Fucking idiot u confused me more

[@MK8MasterJunjie]

@@bhikaristan69yearsagoor87 No need to swear!

[@tessmcginley7769]

KZbin is honestly a better math teacher than the one I have in school. Thank you for saving my life.

[@veretuikubulau7689]

Yeah trues upp

[@BangMaster96]

Patrick has been helping hundreds of thousands of future scholars, whether they are to be Math Teachers, or Engineers, or Scientists, Patrick has dedicated his life for the betterment of this Earth, and it is working very good he has saved thousands from dropping out a Engineer or Math Major through his simple explanations, and thus in the coming future, i hope more Patricks emerge and help make this planet a one filled with love of knowledge

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Cringe

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A world ruled by nerds! :')

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I passed calculus because of you, now I'm here to pass linear algebra.

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Same here lol I passed calc with a C now I'm here to pass vector geometry and linear algebra with an A

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HAHA same!!

[@UnmaskArt]

I'd since passed linear algebra and finished my bachelors in mathematics from the University of Washington ^_^

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WOW!!! i Salute you sir!! hows life after college? haha

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Fantastic, I moved to Poland and now I'm a professional youtuber. This is my channel...

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how many lives this guy have saved?

[@patrickjmt]

well, there was that overweight eastern european guy who swam out too far in the ocean a few years ago while i was in mexico. he was bobbing up and down so i gave him my kick-board and i swam back to shore. pretty sure he was in big trouble... so there is that one at least.

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Mine counts ?

[@patrickjmt]

death by mathematics? i have never heard of it :)

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+patrickJMT It is a pretty common cause of death ! :)

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+noobkosh GLORY FOR THE GREAT SAVIOR (GOD CHRIST) FOR HE CRATED SAVING IN US lol

[@WadeCobie]

I'm in 3rd year studying mathematics as a minor and Patrick continues to help me and noobkosh took the words right out of my mouth; Patrick SAVES me each semester. You are just incredible. Much Love :*

[@patrickjmt]

Much appreciated! ;)

[@AITF045]

+patrickJMT you are a life saver

[@surendrareddy4651]

👎

[@jodie8942]

Bless! My teacher was going over this last week and I did not understand it all, and I didn't really understand the way the book put it either, thank you so much for posting this!!!

[@patrickjmt]

glad it helped :)

[@cassmit9666]

A Message from 2018: Thank you very much for this video. The rules still haven’t changed in matrices, so it’s still valuable!

[@patrickjmt]

happy to help :)

[@miankhizarhayatbhatti20]

@@patrickjmt u still alive

[@miankhizarhayatbhatti20]

@@patrickjmt 😂😂😂😂

[@sheabutterbbby]

Also wanted to keep the thread going, as a messenger from 2019: math is still the same, but great people who do that math on the internet are still helping me out.

[@Happyman1773]

KZbin 2008 with 10 minute limits. Good times

[@PapaSmurff660]

Happyman1773 rofl

[@shermaljones5561]

no.

[@damudboy6935]

2020,

[@fatima-hm9yc]

2021

[@smooth_Koala]

so many years later, i still come back to this channel to review math. super awesome teacher! :D

[@TheSultan1995]

This arrow method is soo useful...thank you

[@patrickjmt]

i should patent it

[@sookoll23]

You really should :P I've multiplied matrices a couple times before, but I always keep forgetting how exactly it works. The arrows just made it a tiiiiny little bit simpler right now :P Anyway, your videos are awesome! They seem to be helping me out of the hellhole that is Math :P Too bad I discovered them an hour before a test :(

[@rajneeshrai1781]

@@patrickjmt yessir

[@angel.6110]

"10min limit" Oh my god. I didn't notice how old this video was. We also had a yellow subscribe box in 2008 if I'm not mistaken.

[@mona-526]

whatshername I didn't notice until I saw this tho I heard him say that.. X)

[@jennipherluwita5998]

I want to see your face

[@patrickjmt]

howdy! so glad i was able to help clear up some of the confusion! good luck in your class!

[@SexyMusicMania]

Patrick, I hope you understand that you aren't just helping people who are struggling in their math class. I have to multiply matrices for my programming class, and I totally forgot how. This is great. You are clear, consistent, and you start from the beginning to end. Thank you! Love your videos!

[@patrickjmt]

glad it helped! and: hang in there... we all have good and bad teachers. do not let the teacher discourage you!!

[@patrickjmt]

USE THE ARROWS on your test! : ) Goooooooood luck!

[@junaid621]

When you showed what the dimensions of the matrices were (mxn) then linked them to say n of the first = m of the second : MIND BLOWN! Your visual cleared up so much confusion for me. Thanks!

[@rekhasingh926]

When you created this I was in second grade enjoying the carefree life. 12 years ahead I have recently failed my sophomore high school exams because of maths and now I'm taking help from you. Thank you Patrick.

[@MotherBra1n]

you deserve a fraction of my tuition fees.

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jsa1993 lmfao he'd be rich

[@clipit4503]

@@RzVids 1/2 lol

[@wbudd]

I'm some old guy who could never quite get the hang of matrices. It's remarkable how your simple approach to how it all works is so comprehensible. Sincere thanks for making it accessible to the likes of me.

[@patrickjmt]

i just taught you, so doesn't that make me a math teacher? : )

[@mario6279]

I am now in the matrix with neo

[@greatheatwave]

+mario rojas 2015 Math struggles

[@aaronmuller6050]

You have transcended the limits of comedy

[@buggld]

The moving arrows actually REALLY helped me, thanks!

[@muhammedsillah3363]

Saying you saved my sanity would be an understatement. I advise you spend at least 60 seconds reflecting on how helpful you've been to so many people. Keep it up man!

[@patrickjmt]

glad i was able to help pull it all together for you!

[@agyapongedmund1315]

THESE are the kinds of people the world looks out for, you have really changed my mentality about MATRICES.Well done.

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Dude this is now 2019, U saved my life, and I belive more in the future.

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watch my maths videos to learn something.

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i had math CXC coming up an you let me understand a lot of things that i never understand, your really GREAT.

[@DonCabbage]

+Dale Richard Same here i have it today actually well in 9 hours. Hoping i get easy matrice questions because i understand them now

[@sfarooq2012]

I passed high school and college with your help! thanks man

[@CurbExcite]

Patrick, although just discovering you tonight while i was hopelessly studying for my exam, i can say that you have indeed made me a lot happier. Thanks a ton and keep it up

[@mbusomabuza7273]

i get it now thank you...we are watching your videos in south africa....very helpful

[@serenitycraft8557]

I am studying Algebra II at this time, and your videos help a lot. The college I am in shares your videos with us students weekly. Thank you for all the help.

[@johnmarston2616]

The service you provide is worth more than the compensation you receive.

[@loper9]

A+ Bravo. Im currently i 8th grade taking an Algebra 1 Highschool Credit class and i haven't had any problems in the class...until today. We started with adding and subtracting matrices and it was a piece of cake. Then came this. She used all these lines, and arrows and it confused me so much. So i came home, searched google for help, and this video popped up. I know completely understand Multiplying Matrices. Thank You.

[@patcism]

"youtube time limit - 2008" haha

[@sayedqayomesadat2018]

Patrick!! Thank you so much. You helped me all the way to Calculus 3. Thank you.

[@jennipherluwita5998]

My hero

[@patrickjmt]

@EdithGuOropeza you are 100% correct, i misread his problem. a 3 x 1 multiplied by a 1 x 2 will produce a 3x2 matrix. sorry for any confusion and thanks for catching my mistake!

[@emmaswepston]

Thank you for making these videos. They are a HUGE help!

[@pankhuridwivedi9671]

(*got stuck in the washing machine*) (*you come from behind*) me-What are you doing swepston(stepson)?

[@patrickjmt]

@cestlina very happy to help : )

[@Harridrone]

I can't remember the last time I had somebody explained math to me so well XD Thank you!

[@Lexxtheentrepreneur]

OMG THANK YOU SO MUCH!!!! I HAVE A TEST TODAY AND LITERALLY HAD NO IDEA HOW TO DO THIS. BUT THANKS TO YOU, NOW I DO!!

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Seriously, you make my life easier with your videos!! Why you're not my Discrete math professor!!?

[@laceybathala1284]

All these years later (for me) your videos are still amazeballs!

[@josueflores4908]

words don't describe how i feel now about how fast i learned this!

[@andyplace]

You are a brilliant explainer. The little arrows may be the best pedagogical tool I've ever seen. Bravo

[@patrickjmt]

glad it helped! : )

[@ikantspel5535]

my prof covered this in under 3 minutes, its no wonder I couldn't keep up. Thanks for posting this video.

[@mohitthawani6839]

thanks you helped me in my unit test and was able to score good marks in in matrices

[@karshana3266]

Two minutes in and I got what I needed. This guy is a god.

[@ne12bot94]

So how does this work in coding or encryption code for programming ?🤷‍♂️

[@justiniwerks9786]

Annie, one way that matrix multiplication is used is to do geometric transformations in video games and CGI. If you want to rotate, reflect, dilate or translate an object on the screen, this can be done by putting the coordinates of the points in the matrix and then multiplying by an appropriate "transforming" matrix.

[@Hasan-wz1nd]

Patrick JMT>Khan academy. Khan academy drags his videos on for about an hour

[@abaundwal]

Only real numbers can be compared :v

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patrick's videos helpful then ,helpful now , helpful forever!!!

[@patrickjmt]

just doin' my best here :)

[@cestlina]

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This guy save my life because I have a test tomorrow😂

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thanks! we watched this in class when our teacher was gone. very helpful!

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lol mine is next tuesday!

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Dude actually saved my ass. I aced it!

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Mine is nxt week lel

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[@patrickjmt]

glad you like it! tons of videos so come back any time !

[@justinemunoz7150]

its 2019 now thanks for the help i hope i pass my exam tommorow

[@NightoLight]

Ahhh me too 😂

[@alemdinarevic6223]

Just a comment of appreciation for what you're doing here, mate. I don't know if you can imagine how many people actually you're helping. A true patrickJMT fan from Bosnia and Herzegovina :D

[@patrickjmt]

Thanks for the kind words Alem :)

[@AITF045]

I'm saving this for later, much appreciated help for a very difficult problem

[@viniamit9625]

true

[@SRCmandan]

Matrices are super useful man, if you ever want to be involved in programming, engineering, or any kind of science, you need to know this. It's involved in making simulations, writing algorithms, anything to do with programming graphics for computer games, engineering for structural analysis, the list literally goes on. Keep up the study =) It will be worth it

[@Spartanical1]

Why would you disable ratings for this??

[@photiniaflame]

Thank you, that was great! "Live" working is so much easier to understand than struggling with inanimate numbers in a text book.

[@mrsrkentertainment3432]

From india the video my 2019

[@Omar-df7hw]

I have this problem that im always afraid of math so afraid that sometimes i cant solve a problem just because of fear and i make so maby mistakes just becaude of my fear i hope you give me a small advise knowing that i dont know how to overcome it

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omar Yehya to conquer fear you must become fear

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false evidence appearing real

[@88spaces]

Thanks for the refresher. I studied this topic in college but I never had to use it until recently. Your instruction helped a lot.

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What was the guy on the left saying ?

[@RAVIOLIdS]

Man ur a god. I was in class not getting this method because I couldn’t understand my teacher cause he is lazy and wants to go as fast as possible cause igcse are coming soon. He kept on asking me and dint even give me time to calculate I’m my head and the whole class was just laughing at me. You made me get this fast in just 3 minutes I got it. Thanks

[@lagiator]

thanks!

[@alif]

And in 2020 you saved my life too cause i really didnt understand anything about this on my online class but now seems i got this thank you!

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u are best

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A K ,hai

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Sheesh..A guy uploaded video in 2008 and helped a person in 2021, Dope!

[@tenton2000k]

whose here for their linear algebra class?

[@geturshittogether2467]

Me.

[@iiBlAkE159]

Honestly I don't even pay attention in class anymore, I just watch your videos the night before the test! And I learn more than I would in weeks at school!

[@damudboy6935]

2020? :)

[@emilylittle550]

This has been one of the few topics I've struggled with during my studies, and now I finally understand how to do it! It's only taken 4 years haha Thank you!

[@alyssaohara5722]

Thank you for this. I am in precalc in high school and we just started learning this. I wasn't quite sure how my teacher was getting his answers, and I was trying to ask questions but was still confused. The showing of the arrows and the explanation just made it so much clearer, thank you so much

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Let his subscriber community grow on to a million! He is amazing

[@bonchodikov6248]

Every year I am forgetting how to do it, and I am re-viewing your video over and over again :D THX bro ! :)

[@Caporacolo]

I actually did these today in Linear Algebra class at university. They are not difficult, but you explain these very well. You are very clear and precise! Good Job, i like your videos and they help me review the lessons i took 'til now :D

[@namariestar7]

Patrick! THank you sou much for posting these videos... I passed Cuantitative Methods with an A, after having dropped the class 2 times before, I wouldn't have done it without your vids... you're AWESOME!!!!!!!!!!!!!

[@dragondude1100]

It's about time. I couldn't get my head wrapped around this until I watched your video thanks a lot.

[@jenxsolo]

I didn't realize how old this video was until you said 10 minute time limit...thanks for your help!!

[@inkster]

Thank you so much for this. You won't even BELIEVE how my teacher "taught" us this. He just wrote the matrices down and said "ok this times that plus this and that and etc etc *writes the answer down* ok moving on". I knew I could rely on you Patrick! :)

[@Axeotll]

thankyou for posting this!! it really helps so many people. Now and again we do tend to hate teacher that are really in your face about how much more they know but then again they have been living longer and they do it all the time so hearing it from you makes it easy to understand.

[@patrickjmt]

@HaydnM35 there are a ton of little things to keep track of, it can be overwhelming!

[@patrickjmt]

@cestlina hope it went well : )

[@jiratchayaloypipon6924]

I learned this when I was in grade 10 (in my country, we study calculus in grade 10 too haha) but I suddenly forgot everything about matrices. You help me revising my math for upcoming entrance exam. Thank you, Patrick

[@patrickjmt]

those arrows are pretty stellar... if i may say so! glad it all helps at least a little bit.

[@josepheldridge7171]

Helps out so much. This is something the professor always rushes through.

[@silverspike1399]

This is a very good explenation, I've seen many people on YT explaining some math, but mostly it's nonsense, what you say in this video is right, but not only right, it's also with good tips and tricks, great job!

[@adamtadele9654]

The clearest explanation ever. I liked, subscribed and understand matrices now

[@patrickjmt]

my pleasure, happy to help :)

[@sjxxxxx6329]

thank u sir! u made my concept crystal clear!! lots of love from india

[@sherifgerges9316]

Lol, I remember seeing this for the first time in 2013. Keep it up patrickJMT!

[@SideofMan2]

I don't know if you're going to receive this message, but do the videos you have on this channel help with Vector calculus and Linear algebra? Or what general class would these videos help most with?

[@hafna7785]

i wasnt even in school when this was posted,it really helped me now...thank you

[@patrickjmt]

@swapshop97 you are very welcome!!

[@madpuri]

Your trick with two paper pointers was really great! that just explained the whole concept behind multiplying matrices!

[@patrickjmt]

@DrAljadi just depends on when you take it. could easily see this in algebra 2, probably around 8th, 9th or 10th grade in usa