What's the command for finding an LU factorization of a matrix on a TI-89 graphing calculator?

[Math100]

What's the correct command for finding an LU factorization of a 3x3 and 4x4 matrix on Ti-89 graphing calculator? I'm trying to find the correct answers and verify/check my answers for Linear Algebra problems.

 

[jedishrfu]

There are many tutorials online that can help. Here is one such example

https://mypages.iit.edu/~ctier/Math252/TI89_for_linear_algebra.pdf

 

[The Bill]

TI makes available a PDF of the guidebook for the TI-89 Titanium. It describes how to use the LU command.