Quadratic Equation

$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

quadratic-formula-calculator.php

Drag the slider to change the equation.

a:

b:

c:


x² - 3x + 1 = 0

2x² - 4x - 5 = 0

x² - x - 3 = 0

5x² + x - 1 = 0

x² - 8x + 7 = 0

x² + 4x + 3 = 0