Understand u-substitution, the idea!

[srpenguinbr]

I remember the first time I watched a video from your channel. I barely knew how to differentiate functions. When you did the u-sub, I didn't understand a word you said because I was used to thinking dx was just a notation that could tell what I call variable. I'm much better in calculus now. Thanks for making me a calculus enthusiast, together with 3blue1brown.

[rizz.boy]

His voice makes it easier to pay attention for some reason

[guitardudee]

my calculus professor is scary good, but he's not good in communicating mathematical intuition. We are always wondering how this became that. You, sir, are the complete package. You communicate mathematical intuition well and can explain everything, at the same time, you are scary good.

[xsytrance]

This was good! You blew my mind when you showed the connection between the chain rule and u-substitution! I've always had a problem choosing a candidate for the u. Thank you very, very much for this explanation!!

[dmorgan]

In two years you will have so many views and subscribers especially since you continue to make so much content. I bet your students love you. I think Professor Leonard has some competition now haha

[Anuradha-cchh]

Bro, you're amazing! You actually know how to explain a concept. God bless you with money. You saving dreams and careers out here!

[ramyhuber]

Wonderful, just watched for the first time. Clear, well presented, easy to follow. Plus I like how you use the marker...

[machoslothman]

great explanation. trying to review material before i start my calc 2 course. you helped me bring my 50 up to an 80 in calc 1 this semester, thank you so much!!

[robertadam]

such a great explanation, thank you very much!

[n_]

By far the best explanation of u sub! Today in class my teacher tried to teach us this method and to say she destroyed the whole idea would be an underestimate. A large part of my skills in mathematics i owe to you! What an amazing teacher, keep going!

[tobiasjdcolvin]

Wow this is the first U sub video that made it click for me, thank you!

[OliviaBenFranklin-jgou]

You're the least confusing calculus youtuber I've encountered! Thanks for these videos!

[drakeaske]

Awesome teacher! I bet your students do very well after seeing how easily you simplify things and show the connections

[theartofmusic]

Man appreciate you for a living I have seen 60 videos about the substition rule of integral and I didn't understand nothing until I saw your video thanks bro I am 15 now years old and I really understand them

[barthennin]

I finally "intuitively" understand "u" substitution for integrating! ..In High school and university, I successfully used u-sub to integrate but it was 'mechanical' w/o really understanding what was really behind it...Never realized it was just the chain rule in reverse! Yay!

[armanchowdhury]

The best, most clear and concise explanation I have ever heard. thank you too much, you are a great teacher.

[Keiserm]

Simple explanation. Thank you so very much. You have made me so much more confident in understanding and using u sub. You should be very proud of your work!

[TheSuntriber]

Once again you succeed in explaining what my textbook doesn't! Thank you!

[TheZmoliver]

You're the king, man. Thank you once again. I was just watching some of these as a refresher but they really help refine my instincts (if that makes any sense) to where this stuff just becomes more intuitive. Snap! Just like 2nd nature.

[ahmeraymen]

u rock the calculus. man you save my brain and energy to understand the two basic concept