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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