Sharp EL-5230 User Manual download pdf (Page 73)

Chapter 5: Equation Solvers

Quadratic and Cubic Equation Solvers

Quadratic (ax

+ bx + c = 0) or cubic (ax

+ bx

+ 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

+ 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

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 131 132

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Sharp EL-5230 User Manual Page 73