Sharp EL-5230 - Manual (Page 73)

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
3x 2 + 4x – 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