HP 39g+ Graphing manual Matrix functions and commands, About functions, Select Real matrix

4.Create a new matrix.

Select Real matrix

5.Enter the equation coefficients.

2 3

4

1 1

1 4

1 2

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
	•	z = –2
	An alternative method, is to use the RREF function. See
	“RREF” on page 13-12.
Matrix functions and commands
About functions	•	Functions can be used in any aplet or in HOME. They
		are listed in the MATH menu under the Matrix
		category. They can be used in mathematical

expressions—primarily in HOME—as well as in programs.

Matrices 13-9