LU Factorization on Ti-89: 3x3 & 4x4 Matrix Solutions

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To find the LU factorization of a 3x3 or 4x4 matrix using the TI-89 graphing calculator, users can utilize the built-in LU command. The TI-89 Titanium guidebook provides detailed instructions on how to access and use this command effectively. For additional guidance, online tutorials are available, including a specific resource that outlines the process for performing LU factorization on the TI-89. This can help verify answers for Linear Algebra problems.
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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.
 
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TI makes available a PDF of the guidebook for the TI-89 Titanium. It describes how to use the LU command.
 

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