Quadratic Formula Calculator
Enter the coefficients of ax² + bx + c = 0 and the calculator solves for x using the quadratic formula. Handles real and complex roots.
Reading the discriminant
D > 0: two real solutions (parabola crosses x-axis twice). D = 0: one repeated real solution (parabola touches x-axis once). D < 0: two complex solutions (parabola doesn't cross x-axis).