Solving a system of linear equations, Solving a system of linear equations: -11 – HP 48g Graphing Calculator User Manual
Page 217
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
To ewaluate a polynomial at a giwen walue:
1. Enter the polynomial in coefficient form onto the stack.
2. Enter the given value
at
which you want to
evaluate
the
polynomial.
3.
Press
¡»^fSOLVEl P O L Y PtS-'FlL.
To con’i'ert s polynomial froni coefilcient to algebraic form:
1. Open the polynomial root-finder.
2.
If it doesn’t
already
contain
the
polynomial in coefficient form,
enter it into the C O E F F I C I E N T S field.
3. With the highlight on the C O E F F I C I E N T S field, press S Y M B
The symbolic polynomial is sent to the stack using x as the
variable.
Solving a System of Linear Equations;
The HP 48 can solve a system of linear equations. To create your
system of equations, you can either choose them from among those
you've stored, or enter them directly.
As you solve
a
system
of
equations,
remember
that
a system of
equations can be represented by a. single matrix equation of the form
AX = B:
18
Equation Form
Matrix Form
ax 4- by 4-
Q.Z
= ki
dx 4- ey — fc = k
-2
gx + liy 4- ic = ka
' a b c ’
'x"
ki
d e —f
y z=
k
2
-g h
1
.
_ z _
. k a .
The
HP 48
makes
use of
this
representation to solve
systems
of
linear
equations rapidly and efficiently.
to begiji the Linear System
1.
Press
iT^fSOCTEl (A)
®
U
Solver.
2. Enter the matrix of coefficients in the H!: field. You can use either
the MatrixWriter or the command line.
Solving Equations 18-11