Texas Instruments -84 Plus, Manual Book

Page: 467 / 696

Chapter 17: Activities 464
2. Press
y 5
(above
z
) to return to
the home screen, and then press
‘
to clear it.
3. Press
2
¿ ƒ
[A]
ƒ
[:]
Ì
1
¿ ƒ
[B]
ƒ
[:]
3
¿ ƒ
[C]
Í
.
The coefficient of the x
2
term, the
coefficient of the X term, and the
constant for the new equation are stored
to A, B, and C, respectively.
4. Press
y [
to recall the store
instruction, and then press
y [
again to recall the quadratic-formula
expression,
5. Press
Í
to find one solution for the
equation 2x
2
N
x + 3 = 0.
b – b
2
4 ac – –
2 a
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