The quadratic formula is x = (-b ± √b^2 - 4ac)/2a. It is used to find the value of x in the ax^2 + bx + c = 0 form of an quadratic euqation.

en.wikipedia.org/wiki/Quadratic_formula

In elementary algebra, the quadratic formula is the solution of the quadratic
equation. There are other ways to solve the quadratic equation instead of using
the ...

www.khanacademy.org/math/algebra/quadratics/solving-quadratics-using-the-quadratic-formula/v/using-the-quadratic-formula

With the quadratic formula, we can solve any quadratic equation! Learn how to
use it with an example.

www.khanacademy.org/math/algebra/quadratics/solving-quadratics-using-the-quadratic-formula/a/quadratic-formula-explained-article

The quadratic formula helps you solve quadratic equations, and is probably one
of the top five formulas in math. We're not big fans of you memorizing formulas, ...

www.sosmath.com/algebra/quadraticeq/quadraformula/quadraformula.html

Consider the general quadratic equation. displaymath90. with
tex2html_wrap_inline92 . First divide both sides of the equation by a to get.
displaymath96.

www.purplemath.com/modules/quadform.htm

Demonstrates the use of the Quadratic Formula and compares the
QuadraticFormula to the solutions found by factoring.

www.webmath.com/quadform.html

This page will show you how to use the quadratic formula to get the two roots of a
quadratic equation. Fill in the boxes to the right, then click the button to see ...

www.coolmath.com/algebra/09-solving-quadratics/05-solving-quadratic-equations-formula-01

This algebra lesson explains how to solve quadratic equations using the
quadratic formula.

mathworld.wolfram.com/QuadraticFormula.html

Quadratic Formula. EXPLORE THIS TOPIC IN the MathWorld Classroom. The
formula giving the roots of a quadratic equation ...

www.ixl.com/math/algebra-1/solve-a-quadratic-equation-using-the-quadratic-formula

Fun math practice! Improve your skills with free problems in 'Solve a quadratic
equation using the quadratic formula' and thousands of other practice lessons.