Entering A Calculation: The Quadratic Formula - Texas Instruments TI-82 STATS Manual Book

Entering a Calculation: The Quadratic Formula

Use the quadratic formula to solve the quadratic equations 3X
N X + 3 = 0. Begin with the equation 3X
¿ ƒ [
1. Press
3
store the coefficient of the X
2. Press ƒ [
:
you to enter more than one instruction on a
line.
¿ ƒ [
3. Press
5
store the coefficient of the X term. Press
ƒ [
] to enter a new instruction on the
:
same line. Press
) to store the constant.
4. Press Í to store the values to the variables
A, B, and C.
The last value you stored is shown on the right
side of the display. The cursor moves to the
next line, ready for your next entry.
5. Press £ Ì ƒ [
¡ ¹ ƒ [
4
ƒ [ ] ¤ to enter the expression for one
A
of the solutions for the quadratic formula,
2 4
b b ac
2 a
6. Press Í to find one solution for the
2
equation 3X + 5X + 2 = 0.
The answer is shown on the right side of the
display. The cursor moves to the next line,
ready for you to enter the next expression.
6 Getting Started
] (above ) to
A
2
term.
] (above Ë). The colon allows
] (above ) to
B
¿ ƒ [
] (above
2
C
] Ã y [ ] ƒ [
B
‡
] ƒ [ ] ¤ ¤ ¥ £
A C
2
+ 5X + 2 = 0.
]
B
2
2
+ 5X + 2 = 0 and 2X
2