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HP HP-28S User Manual

HP HP-28S
341 pages
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Page #110 background imageLoading...
Page #110 background image
Now
make
sl
a
negative
sign.
-1
Return
the
second
solution
to
level
1"'1
1
~WElc:::::Jc:::::Jc:::::Jd
1.
Ir~;a
!I
DDWElc:::::Jc:::::Jc:::::Jc:::::J
The
two
roots
of
x
2
-
6x + 8
are
x
4
and
x 2.
Isolating a Variable
The
HP-28S
can
isolate a single
occurrence
of
a variable
in
an
equa-
tion,
returning
an
expression
representing
the
symbolic
solution
of
the
equation.
In
other
words,
if x is
the
variable for
which
the
equa-
tion
is solved,
and
a,
b,
and
c
are
the
other
variables
in
the
equation,
isolating
x
produces
an
expression
in
a,
b,
and
c
such
that
the
equa-
tion
is satisfied
when
x
has
the
value
of
the
expression.
For
the
first example, isolate x
in
the
equation
a(x + 3) - b =
c.
This
example
is
simple
because
there
is
only
one
occurrence
of
x. Later
examples
show
how
to
manipulate
the
equation
to
produce
a single
occurrence
of
x.
Clear
the
stack .
• 1 CLEAR 1
Put
the
equation
on
the
stack.
c:J
A 0
CD
X G 3
.OJ
G B 0 c
1 ENTER 1
3:
2:
1:
'A*(X+3)-B=C'
DDWElc:::::Jc:::::Jc:::::Jc:::::J
9:
Symbolic
Solutions
109

Table of Contents

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Quick Reference49 pages
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HP HP-28S Specifications

General IconGeneral
BrandHP
ModelHP-28S
CategoryCalculator
LanguageEnglish

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