Solving a System of Equations Using an LU Factorization

Solving the matrix system Ax=b when L and U for which A=LU have been previously determined. I show in another video how to obtain the LU factorization.

[GrunterraHunterach]

This man has gotten me to understand concepts in 45 seconds flat what my uni prof couldn't teach her 48% average class in 4 months

[manuelfrn]

Thanks! After 30 years I understood it!

best explanation of the subject on the web, thank you!

[CLL]

OMG!! Thank you so muchh!! Realllyy helpful!! I read my textbook for hours and still don’t understand, after watching this 9 min length i can do my homework successfully !!!!

[anuraagkansara]

Excellent Explanation!!! Keep up the good work.

[KevinGarcia-glgb]

Thank you very much for this video I really appreciate it.

[nouhailaelatoubi]

Thank you the best explanation ever !!!

[woodchuk]

I understand the concept easily enough, but what’s the point of ever doing it this way even if you don’t have a computer? Seems like an awful lot of calculation...for a 3x3 system, I could solve it faster with Cramer’s rule than I ever could with this method. This whole approach just doesn’t seem very practical...am I missing something or is it just me?

[loredelfayer.areieta]

Thank you so much. This made it super easy for me. You are amazing!!

[SearchKnowledge]

Thank you VERY mucht, best explenation!!

[odarteilamptey]

understood in 3mins now i can pas my exams in peace

[disterben]

What happens if when finding U, you need to switch the rows?

[berkaykurkcu]

You sound like the owner of Ishnala Supper Club in Wİsconsin... Just search him on YouTube, Robert Prosser..