# HP 48gII User Manual Page 126

Graphing calculator.

2
3
=
A
1
2
This system has the same number of equations as of unknowns, and will be
referred to as a square system. In general, there should be a unique solution
to the system. The solution will be the point of intersection of the three planes
in the coordinate system (x
To enter matrix A you can activate the Matrix Writer while the A: field is
selected. The following screen shows the Matrix Writer used for entering
matrix A, as well as the input form for the numerical solver after entering
matrix A (press ` in the Matrix Writer):
Press ˜ to select the B: field. The vector b can be entered as a row vector
with a single set of brackets, i.e.,
After entering matrix A and vector b, and with the X: field highlighted, we can
press @SOLVE! to attempt a solution to this system of equations:
A solution was found as shown next.
5
x
1
=
3
8
,
x
x
,
2
2
4
x
3
, x
, x
) represented by the three equations.
1
2
3
13
=
and
b
13
.
6
@@@OK@@@ .
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