HP 15c Collector's Edition Owner's Handbook Manual page 162

150 Section 12: Calculating with Matrices
Sign Change, Inverse, Transpose, Norms, Determinant
Keystroke(s)
"
⁄
´ ⁄
´ >
´ >
´ >
´ >
One-Matrix Operations:
Result in
X-register
4
7
8
9
singular matrix
LU
⁄
Effect on Matrix
Specified in
X-register
HP 15c Advanced Functions Handbook
Effect on
Result Matrix
LU