HP Prime Graphing Calculator - Manual (Page 479)

Matrices 475
3. Return to the Matrix
Catalog.
St
The size of M1
should be showing
as 3.
4. Select and clear M2,
and re-open the
Matrix Editor:
[Press
\ or = to
select M2] C
E
5. Enter the equation
coefficients.
2
E 3 E
[Tap in cell R1, C3.]
4
E
1 E 1 E
Q 1 E
4 EQ 1
E 2 E
6. Return to Home view
and left-multiply the constants vector by the inverse of
the coefficients matrix:
HA Q 2
S ns
A Q 1 E
The result is a vector of
the solutions: x = 2, y = 3
and z = –2.
An alternative method is
to use the RREF function
(see page 477).