System, Representing a, As matrices – HP 49g Graphing Calculator User Manual
Page 138
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Representing a
system
as matrices
To solve a linear system, you represent the system in matrix form within
the numeric solver. In order to represent the system in matrix form, you
need to transpose the equations to a form where the independent
variables are to the left of the = sign, and the constant is on the right. For
example, consider the following set of equations:
2 x - S y + 1
3,r + 2 y - I
2
14
Before you attempt to solve this system, manipulate the equations to the
following form:
2 x - S y = -5
3a- + 2 y = l b
These equations can be represented as a set of three matrices:
e a matrix that contains the variable coefficients
2 -8
3 2
a matrix that contains the constants
-5
15
® a matrix that contains the variables to solve for.
Wlren you solve this system, you specify the first two matrices and the
answers are returned in the third matrix.
Page 6-8
Solving equations