HP -32S Owner's Manual page 190

D17 RCL fl
D18 RCLx F
D19 RCLx H
D20 - (AxExT) + (DxHxQ + (GxFxB) -
(GxExQ - (AxFxH).
D21 RCL D
D22 RCLx B
D23 RCLx I
D24 - (AxExI) + (DxHxQ + (GxFxB) -
(GxExQ - (AxFxH) - (DxBxT).
D25 RTN Returns to the calling program or to
PRGM TOP.
Bytes and Checksum: 037.5, 152E
Flags Used: None.
Memory Required: 348 bytes: 212 for program, 136 for variables.
Program Instructions:
1. Key in the program routines; press [c] when done.
2. Press IXEQI A to input coefficients of matrix and column vector.
3. Key in coefficient or vector value (A through L) at each prompt
and press IR/s I.
4. Optional: press IxeqI D to compute determinant of 3 x 3 system.
5. Press IXEQ 11 to compute inverse of 3 x 3 matrix.
6. Optional: press Ixeq IA and repeatedly press IR/s I to review the
values of the inverted matrix.
7. Press Ixeq IM to multiply the inverted matrix by the column vec
tor and to see the value of X. Press IR/s I to see the value of Y,
then press IR/SI again to see the value of Z.
8. For a new case, go back to step 2.
188 12: Mathematics Programs