Operation Manual

Chapter 17: Activities 295
Entering a Calculation
Begin with the equation 2x
2
N 11x + 14 = 0.
Converting to a Decimal
You can show the solution as a decimal.
1. Press
2 ¿ ƒ A to store the
coefficient of the x
2
term.
2. Press ƒ [:]. The colon allows you to
enter more than one instruction on a line.
3. Press Ì
11 ¿ ƒ B to store the
coefficient of the X term. Press ƒ [:] to
enter a new instruction on the same line.
Press
14 ¿ ƒ C 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 ƒ ^
1 Ì ƒ B Ã y C ƒ
B ¡ ¹ 4 ƒ A ƒ C ~ ~ 2 ƒ A
to enter the expression for one of the
solutions for the quadratic formula,
6. Press Í to find one solution for the
equation 2x
2
N 11x + 14 = 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.
1. Press ƒ ^
4 to select 4F3 4D from the
FRAC shortcut menu.
2. Press Í to convert the result to a
decimal.
b– b
2
4ac–
2a
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