Sharp EL-5230, EL-5250 Quadratic and Cubic Equation Solvers, X¤-6.333333333, Example

Chapter 5: Equation Solvers

Quadratic and Cubic Equation Solvers

Quadratic (ax2 + bx + c = 0) or cubic (ax3 + bx2 + 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

3x2 + 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

a=z	0.
b=	0.
c=	0.

•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
		X⁄	5.
	equation.
•	After solving, press e or j to	X¤–6.333333333
	return to the coefficient entering display.
	You can use @ h to solve the
	quadratic equation, regardless of the cursor position.

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