Casio fx-7400G Manual De Usuario

Finding the roots of a quadratic equation, using the quadratic formula.

The program reminds you of the form of the equation: ax

2

 + bx + c = 0. You may have

to rewrite your equations into this form before entering them.

Input the three coefficients in the correct order, pressing 

 after each.

Test the program by finding the solutions to the equation:

2

 = 10 – x

In this case, first rewrite the equation to the appropriate form, x

2

 + x – 10 = 0 to see that

the coefficients are A = 1, B = 1 and C = -10.

The two approximate solutions are x = 

2.702

 and x = 

-3.702

.