Quadratic Equation Solver

A quadratic equation is a polynomial equation of the 2nd degree. It's basic form is this:

ax2 + bx + c = (x - x1)(x - x2)

And the solutions are calculated:

x1/2 =

− b ± √   b2 - 4ac 

X2 X
Round to the nearest thousandths?Yes

The Solution Will Appear Here!

Free JavaScripts provided
The JavaScript Source

There are few more things you should know.
The expression under the square root is called the discriminant:

D = b2 - 4ac

There are 3 possible cases:

  1. If D > 0, both roots are real numbers.
  2. If D = 0, then there is exactly one root, aka called a double root
  3. If D < 0, (non-real) complex conjugates roots

Return from Quadratic Equation Solver to Free Online Math Calculators

Return from Quadratic Equation Solver to Free Math Help Online - Home Page