Casio fx-3650P



Casio fx-3650P

|Quadratic Formula |

|If ax2 + bx + c = 0, then [pic] . |

Programming Guide

The following formulae would be used in the program.

[pic] and [pic]

|Programming steps |Remarks |

|[pic] [pic] [pic] 1 |Switch to Program Edit Mode. |

|1 |Select P1 for programming. |

|? ( A : ? ( B : ? ( C : |Store input data a, b, c in memories A, B, |

| |C. |

|[pic] [pic] B [pic] [pic] 4 A C [pic] ( D : |Calculate[pic]. Store the result in memory |

| |D. |

|[pic] D [pic] B [pic] [pic] 2 A ( |Show output for x1. |

|[pic] B [pic] A [pic] [pic] |Answer for x2. |

|[pic] [pic] [pic] 2 |Exit Program Edit Mode and return to Run |

| |Mode. |

Running the program

The table below summarizes how you may use the program to solve the following problem.

● Solve 2x2 + x - 3 = 0 .

|Keying steps |Display |Remarks |

|[pic] 1 |A? |Select P1. * stands for the value stored in |

| |* |memory. |

|2 [pic] |B? |Input for a. The calculator prompts for input |

| |* |for b. |

|1 [pic] |C? |Input for b. The calculator prompts for input |

| |* |for c. |

|[pic] 3 [pic] |(D(B) (2A |Input for c. Show answer for[pic]. |

| |1 | |

|[pic] |(B (A (Ans |Answer for[pic]. You can continue your input |

| |(1.5 |for the next equation by pressing [pic]. |

|[pic] |0 |Exit. |

Further Practice

Now you can try to solve the following questions using the program. Check whether you can get the correct results.

|Equation |Input (A; B; C) |Roots |Output |

|x2 ( 9 = 0 |1; 0; (9 |3, (3 |3; (3 |

|2x2 + x + 3 = 0 |2; 1; 3 |No real roots |Math ERROR |

|x2 ( 4x + 4 = 0 |1; (4; 4 |2 (double root) |2; 2 |

[pic][pic][pic]

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