HP 39gs - Page 197

Matrices 15-9
2. Create the vector of the
constants in the linear
system.
5 7
1
3. Return to the Matrix
Catalog.
MATRIX
In this example, the
vector you created is
listed as M1.
4. Create a new matrix.
Select Real matrix
5. Enter the equation
coefficients.
23
4
11
1 4
12
In this example, the matrix you created is listed as
M2.
6. Return to HOME and enter the calculation to
left-multiply the constants vector by the inverse of the
coefficients matrix.
M2
x
–1
M1
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
“RREF” on page 15-12.
HP 39gs English.book Page 9 Wednesday, December 7, 2005 11:24 PM