Sharp EL-5230, Operation Manual

Page: 73 / 132

71
Chapter 5: Equation Solvers
Quadratic and Cubic Equation Solvers
Quadratic (
ax
2
+ bx + c = 0
) or cubic (
ax
3
+ bx
2
+ cx + d = 0
) equations may be
solved using these functions.
1 Quadratic equation solver (QUAD):
b 3 2
2 Cubic equation solver (CUBIC):
b 3 3
• If there are more than 2 results, the next solution can be displayed.
• The results obtained by this function may include a margin of error.
Example 1
3
x
2 + 4
x
– 95 = 0
→ x
= ?
1. Press
b 3 2
to select
QUAD of the EQN mode.
2. Enter the value of each coefficient (a,
etc.)
3
e
4
e S
95
• Coefficients can be entered using ordinary arithmetic operations.
• To clear the entered coefficients, press
j
.
• Press
d
or
u
to move line by line.
3 After inputting the last coefficient,
press
e
to solve the quadratic
equation.
• After solving, press
e
or
j
to
return to the coefficient entering display.
You can use
@ h
to solve the
quadratic equation, regardless of the cursor position.
a=z 0.
b= 0.
c= 0.
X⁄ 5.
X¤–6.333333333