[Linear Algebra] Cofactor Expansion

I teach how to use cofactor expansion to find the determinant of matrices. I also teach that the determinants of a triangular matrix are the product of diagonal entries.

LIKE AND SHARE THE VIDEO IF IT HELPED!

#LinearAlgebra #Algebra #UniversityMath #Lecture

*--Playlists--*

*--Recommended Textbooks--*

Hello, welcome to TheTrevTutor. I'm here to help you learn your college courses in an easy, efficient manner. If you like what you see, feel free to subscribe and follow me for updates. If you have any questions, leave them below. I try to answer as many questions as possible. If something isn't quite clear or needs more explanation, I can easily make additional videos to satisfy your need for knowledge and understanding.

[emmanuellimaco]

Thank you for the vid, very informative, although at 4:53 -20 + 22 equals positive 2, not negative.

[gohhongyi]

shouldnt it be cofactor of ith row and cofactor of ith column? instead of column and row... since a(ij) refers to ith row and jth column

[lordtouchmesama]

Thank you for the video. Extremely helpful for this test tomorrow.

[zacharygammo]

Thank you so much, have a linear algebra exam in a week and this video just helped me so much

[neonkuna]

Okay. The examples kinda helps. I was confused by those formulas. As to. What exactly are we trying to achieve here. Also, there are so many ways, even simpler ways of getting the determinant I don't understand why this way is particularly important

[MachoMandem]

Well explained and straight to the point. Commendable work indeed.

[scottmcentee]

What's the difference between cofactor expansion and the method used in the previous video? They look exactly the same

[MaxGuides]

Does multiplying the product of the diagonals work for an upper triangular matrix as well? (doing homework right now)

[gg-pvie]

omg dude this answered so many of my questions thank you so much!!!

[blakef.]

My tuition money should be going to you instead of my professors

[neonkuna]

I'm. So confused. I don't understand what introducing the "c" term does.
I was looking for an introduction to this cofactor expansion and damn

[bassingpeter]

Pls this tutorial is really helping, but at last portion where you had -20+22=-2, I don't understand why it so.pls help me with that

[averycasto]

The words column and row need to be switched at 2:24

[eugenengesa]

You don't use the +-+ cause i was told its
-+-
+-+. Necessary

[alhaithamaljabri]

Thank you Sir, I really appreciate it!

[ghaitm]

I hate youtube so much, why do i have to go to the 5th page of results to get to the best exlanation about the whole thing !
may Allah bless you <3

[neonkuna]

We need to know why determinants are particularly important. Besides properties of determinants. We need to know why we should even care about this stuff

[arturgharibkhanyan]

this guy is high or something lol 2 videos in a row he has a mistake