Math Medics
S.o.s. Math: Quadratic Equations Quadratic Formula
Here you can find a general overview of the quadratic formula, complete with a full breakdown of how to come up with the quadratic formula with a quadratic equation, as well as am example of using the quadratic formula to solve a...
Mangahigh
Mangahigh: Algebra: Solve Trinomials by Using the Quadratic Formula
Students watch an online tutorial on the concept of solving trinomials using the quadratic formula. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their...
Purple Math
Purplemath: Completing the Square: Deriving the Quadratic Formula
View examples on completing the square and deriving the quadratic formula. The key to solving by completing the square is "practice, practice, practice". By so doing, the process will become more "automatic", and you'll be much more...
CK-12 Foundation
Ck 12: Quadratic Formula and Complex Sums
[Free Registration/Login may be required to access all resource tools.] Solve quadratic equations with real coefficients that have complex solutions.
CK-12 Foundation
Ck 12: Trigonometric Equations Using the Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Examples of solving trigonometric equations using the quadratic formula.
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Use the quadratic formula to solve equations and find the vertex of parabolas.
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Learn how to use the quadratic formula.
CK-12 Foundation
Ck 12: Algebra: Use Graphs to Solve Quadratic Equations
[Free Registration/Login may be required to access all resource tools.] Determine the number of solutions to a quadratic equation and find such solutions by graphing.
CK-12 Foundation
Ck 12: Algebra: Comparing Methods for Solving Quadratics
[Free Registration/Login may be required to access all resource tools.] Select the best method to solve-real world quadratic equation problems.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Solving Quadratic Equations by Finding Square Roots
Thirteen problems present a variety of practice solving quadratic equations by finding square roots. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the...
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] This lesson covers deriving the quadratic formula and using it to solve any quadratic equation.
Khan Academy
Khan Academy: Solve Quadratic Equations: Complex Solutions
Solve quadratic equations using the quadratic formula. Some of the equations have real solutions while others have complex solutions.
Discovery Education
Discovery Education: Web Math: Using the Quadratic Formula
This WebMath site provides interactive problem solvers to understand the quadratic formula and solve quadratic equations by factoring. In addition to providing answers, these 'solvers' show the step-by-step method in which to get there.
Paul Dawkins
Paul's Online Notes: Algebra: Quadratic Equations Part Ii
Detailed math tutorial features notes and examples that illustrate how to solve quadratic equations using complete the square then use that to derive the quadratic formula.
Interactive Mathematics
Interactive Mathematics: Quadratic Equations
Using modeling, the world of quadratics is explored. Learn how to solve quadratics using methods of factoring, completing the square, and the quadratic formula. Also included are methods for graphing quadratic functions.
Khan Academy
Khan Academy: Quadratic Formula
Solve quadratic equations using the quadratic formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Solving Quadratic Equations With Square Roots
Find a quick, concise explanation for how to solve quadratic equations using square roots. An example is given and clearly explained.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Graphs of Quadratic Equations
Twenty-one problems present a variety of problems working with various aspects of solving and graphing quadratic equations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the...
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Quadratic Equations
A detailed tutorial that will guide you through various methods for solving quadratic equations: factoring, square root, completing the square, and quadratic formula. Follow step-by-step examples, view video problem-solving...
Wolfram Research
Wolfram Math World: Quadratic Equation
This MathWorld site shows how to derive the quadratic formula.
University of St. Andrews (UK)
University of St. Andrews: Quadratic Equations History
This site from the University of St. Andrews provides an extensive history of quadratic, cubic, and quartic equations including various historical figures and their contributions to modern methods of solving quadratics.
Purple Math
Purplemath: The Quadratic Formula Explained
An excellent discussion on solving quadratic formulas, accompanied by numerous examples.
Help Algebra
Help algebra.com: Quadratic Formula
This presentation of the quadratic equation includes a discussion on the discriminant and a derivation of the quadratic formula.