In this tutorial, you will learn how to find discriminant and roots of a quadratic equation with Kalkules.
Find discriminant and roots of quadratic equation:
x2 + 5x + 6 = 0
- Open Kalkules and select Tools/Quadratic equation from the main menu.
- In the displayed window, enter the quadratic equation coefficients as follows:
a=1, b=5, c=6
- Press Calculate.
- The results are displayed in the bottom half of the window. In this example, the discsriminant (D) is 1 and the roots (x1, x2) are -3 and -2.
Quadratic Equations With Complex Roots
Some quadratic equations have a negative discriminant, which means the roots of the equation are complex numbers. In this case, the roots will be calculated as complex numbers.
For example, quadratic equation
2x2 - 6x + 5 = 0 has discriminant value
-4 and complex roots
Where To Get Kalkules
You can download Kalkules for free here.