HP Prime Graphing Calculator - Manual (Page 480)

474 Matrices
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 476).
Matrix functions and commands
Functions Functions can be used in any app or in Home view. They
are listed on the Math menu under the Matrix category.
They can be used in mathematical expressions—primarily
in Home view—as well as in programs.
Functions always produce and display a result. They do
not change any stored variables, such as a matrix
variable.
Functions have arguments that are enclosed in
parentheses and separated by commas; for example,
CROSS(vector1,vector2). The matrix input can be either a
matrix variable name (such as M1) or the actual matrix
data inside brackets. For example, CROSS(M1,[1 2]).
Menu format By default, a Matrix function is presented on the Math
menu using its descriptive name, not its common
command name. Thus the shorthand name TRN is
presented as Transpose and DET is presented as
Determinant .
If you prefer the Math menu to show command names
instead, deselect the
Menu Display option on page 2 of
the Home Settings screen (see page 26).
Commands Matrix commands differ from matrix functions in that they
do not return a result. For this reason, these functions can
be used in an expression and matrix commands cannot.