Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Quadratic Formula
Find a quick, concise explanation of the quadratic formula. Examples are given and clearly explained.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: The Quadratic Formula
Fifteen problems present practice working with identity the quadratic formula. 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 "View Solution" button to...
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: Analysis: Quadratic Formula and Complex Sums
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify complex roots of quadratic functions with the quadratic formula, and adding and subtracting complex numbers. Students examine guided...
CK-12 Foundation
Ck 12: Algebra: Identification of Quadratic Models
[Free Registration/Login may be required to access all resource tools.] Understanding the equations of parabolas
CK-12 Foundation
Ck 12: Algebra: Solutions Using the Discriminant
[Free Registration/Login may be required to access all resource tools.] Given a quadratic equation, find its discriminant and use the result to determine the nature of the solutions.
CK-12 Foundation
Ck 12: Algebra: Solutions Using the Discriminant
[Free Registration/Login may be required to access all resource tools.] Learn how to use the discriminant to solve problems and determine the number of solutions to quadratic equations.
Math Is Fun
Math Is Fun: Derivation of Quadratic Formula
The learning resource investigates the quadratic formula. Students learn how the formula is derived by completing the square and solving for x.
Sophia Learning
Sophia: Quadratic Formula Tutorial
Determine the use of the quadratic formula and when and why it is used to solve quadratic equations.
Sophia Learning
Sophia: Solving for Quadratic Equations
Solve for x using the quadratic formula and complete practice problems. Assess learning with a quiz.
BBC
Bbc: Higher Bitesize Maths: Quadratic Theory
A tutorial on quadratics presents topics including: factoring and solving quadratics, graphing quadratic functions, using completing the square and the quadratic formula to solve functions, the discriminant and conjugates. Plenty of...
Interactive Mathematics
Interactive Mathematics: Quadratic Formula, Origin, Examples & Exercises
Presents the quadratic formula, gives examples and exercises, and links to popup windows explaining the solutions. Contains a window allowing the user to enter values for a process illustration (requires LiveMath plugin, available from a...
Lawrence Hall of Science
The Math Page: Skill in Algebra: Quadratic Equations
Here is a site that clearly and thoroughly explains the quadratic equations, including how to solve them by factoring, completing the square, and using the quadratic formula. There are example problems solved, problems for the student to...
Purple Math
Purplemath: Algebra Resources
Purplemath contains about 40 different lessons on various algebra topics. The lessons are divided into five different sections: preliminary topics, beginning algebra, intermediate algebra, advanced algebra, and word problems. The lessons...
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...
Cool Math
Coolmath: Complex Numbers in the Quadratic Formula
Use this algebra lesson to find out how to use the quadratic formula when you get complex solutions.
Other
Mathway: Algebra Formulas
Comprehensive resource provides algebra formulas for exponents, absolute value, factoring Pythagorean Theorem, linear equations, quadratic formula, distance formula, midpoint formula, and slope of a line through two points.
Illustrative Mathematics
Illustrative Mathematics: F Bf, a Sse Building a General Quadratic Function
This task is a followup to the one called 'Building an explicit quadratic function.' In this one, learners follow the same process with a general quadratic function. The operations take place in the opposite order and the goal is to find...
Illustrative Mathematics
Illustrative Mathematics: A sse.b.3: Profit of a Company
This task compares the usefulness of different forms of a quadratic expression. Learners have to choose which form most easily provides information about the maximum value. Aligns with A-SSE.B.3.
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.
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.
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.
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: Analysis: Quadratic Formula and Complex Sums
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving quadratic equations when the answers are complex numbers. Students examine guided notes, review guided practice and attempt practice...