Solve Quadratic Equations - Calculator and Solver

An easy to use online calculator and solver for quadratic equations of the form

a x2 + b x + c = 0
The calculator uses the quadratic formulas.
x 1 = [- b + √D ] / 2a      and      x 2 = [- b - √D ] / 2a

to calculate the solutions of the quadratic equation. The discriminant D given by
D = b 2 - 4ac

The solutions given by this calculator may be real or complex numbers. In the case of real numbers, the imaginary part is equal to zero.

Use the Calculator to Solve Quadartic Equations

1 - Enter the coefficients a, b, c and the number of decimal places desired as real number and press "Solve". This calculator can solve quadratic equations with real and complex solutions. The output boxes on the right gives the imaginary parts.

a =
b =
c =
Decimal Places =
Discriminant: D =
Real Part       Imaginary Part
x1 = +
x2 = +

More References and links

Proof of quadratic formulas.
quadratic equations
Step by Step Quadratic Equation Solver
Maths Calculators and Solvers.
Geometry Calculators and Solvers.