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TI-83 Plus Activities 540
Chapter 17:
Activities
The Quadratic Formula
Entering a Calculation
Use the quadratic formula to solve the quadratic equations 3X
2
+ 5X + 2 = 0 and
2X
2
N
X + 3 = 0. Begin with the equation 3X
2
+ 5X + 2 = 0.
1. Press
3
¿
ƒ
[
A
] (above
) to store
the coefficient of the X
2
term.
2. Press
ƒ
[
:
] (above
Ë
). The colon allows
you to enter more than one instruction on a line.
3. Press
5
¿
ƒ
[
B
] (above
Œ
) to store
the coefficient of the X term. Press
ƒ
[
:
] to
enter a new instruction on the same line. Press
2
¿
ƒ
[
C
] (above
) to store the
constant.