Casio CFX-9800G - Page 92

Quadratic equations that produce, multiple root (1 or 2) solutions
or imaginary number solutions Epi acer Ege
The following examples illustrate how multiple-root solutions and imaginary number solu-
tions are-handled.” . ae 2
equation that produces a single-value solution
*To solve a quadra
Example| To solve the following quadratic equation: “"’
x+2x4+1=0
i je)(2 lee)
[Fi)(SOL)
® To solve a cubic equation that produces a multiple-value solution
To solve the following cubic equation:
34x24 5x-2=0 |
" (BOWE BHea
E(S0L)
Alp nt ive
*To solve a cubic: equation that produces-an:imaginary: number solution
Example |; To solve the following cubic equation: horn
B+P74x53=0 g
Om MMOD rs
N(SOL)
asi +bx ercatde6
It
may
take
considerable
time
for
the
catcutation
resuit
of
cubic
equations
to
appear
on
the
display.
Failure
of
a
result
to
appear
immediately
does
not
mean
that
the
unit
is
not
functioning
properly.
Changing Coefficients
You
can
change
a
coefficient
either
before
or
after
you
register
it
by
pressing
&@.
To
change
a
coefficient
before
registering
it
with
&
Press
the
@@
key
to
clear
the
current
value
and
then
input
another
one.
®To
change
a
coefficient
after
registering
it
with
Ee
Use
the
cursor
keys
to
highlight
the
cell
that
contains
the
coefficient
that
you
want
to
change.
Next,
input
the
value
that
you
want
to
change
to.
Clearing All the Coefficients
While
in
the
Quadratic
or
Cubic
Equation
Mode,
press
the
[F2)(CLR)
function
key.
This
operation
clears
all
the
coefficients
to
zero.
(2)(CLR) IFSCIELE
@
7-4
What
to
Do
When
an
Error
Occurs
© Error during coefficient value input
Press
the
@@
key
to
clear
the
error
and
return
to
the
value
that
was
registered
for
the
coefficient
before
you
input
the
value
that
generated
the
error.
Try
inputting
a
new
value
again.
_ @ Error during calculation
Press
the
B&
key
to
clear
the
error
and
display
coefficient
a.
Try
inputting
values
for
the
coefficients
again.
‘
*Note
that
even
when
you
press
the
key, the
values
assigned
for
coefficients
are
retained.
—149-—