Unit Plan
Khan Academy

Khan Academy: Solving Quadratics by Completing the Square

For Students 9th - 10th Standards
Practice some multiple-choice problems solving quadratics by completing the square.
Activity
Cool Math

Coolmath: Graphing by Completing the Square How

For Students 6th - 8th
Explore and understand graphing by completing the square.
Unit Plan
Mangahigh

Mangahigh: Algebra: Use the Completed Square

For Students 9th - 10th Standards
Students learn about the concept of completing the square by exploring a tutorial. They can then test their knowledge by taking a ten question assessment that increases in difficulty as they correctly answer questions.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A rei.b.4.a: Visualizing Completion of the Square

For Teachers 9th - 10th
The purpose of this visualization task is to help provide geometric intuition for the algebraic process called ''completing the square.'' Aligns with HSA-REI.B.4.a.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Complete the Square

For Students 9th - 10th Standards
Find a quick, concise explanation of how to complete the square. An example is given and explained to illustrate the method.
Unit Plan
Khan Academy

Khan Academy: Completing the Square (Intro)

For Students 9th - 10th Standards
Try these multiple-choice practice problems on completing the square.
Unknown Type
Khan Academy

Khan Academy: Completing the Square

For Students 9th - 10th Standards
Solve quadratic equations of the form ax^2+bx+c by completing the square. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Handout
Math Medics

S.o.s. Math: Quadratic Formula: Completing the Square

For Students 9th - 10th Standards
This tutorial explains the quadratic formula by reviewing its origin from the process of completing the square. Includes examples and a few exercises.
Unit Plan
Math Planet

Math Planet: Completing the Square

For Students 9th - 10th Standards
If you've got a quadratic equation on the form of ax^2 + c = 0 Then you can solve the equation by using the square root of x = square_root(-c/a) or x = -square_root(-c/a)
Activity
Help Algebra

Help algebra.com: Completing the Square

For Students 9th - 10th Standards
The process of completing the square is presented with a detailed description of the process and an example to show the work step by step. An example with a non-integer leading coefficient is also included.
Handout
Paul Dawkins

Paul's Online Notes: Algebra: Quadratic Equations Part Ii

For Students 9th - 10th Standards
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.
Unknown Type
Wyzant

Wyzant: Solve by Completing the Square

For Students 9th - 10th Standards
The practice sheet reviews how to solve equations by completing the square. The resource consists of an answer sheet and example problem.
Unit Plan
Texas Education Agency

Texas Gateway: Solving Quadratic Equations Using Algebraic Methods

For Students 9th - 10th Standards
Given a quadratic equation, the student will solve the equation by factoring, completing the square, or by using the quadratic formula.
Activity
Math Is Fun

Math Is Fun: Completing the Square

For Students 9th - 10th
The learning resource investigates how to complete the square. Students learn about the algebra concept by exploring definitions and examples. A link to practice problems is included.
Activity
Wyzant

Wyzant: Completing the Square Calculator

For Students 9th - 10th
The learning tool is a calculator that solves equations by completing the square. An example and quick-start guide is available.
Handout
Math Medics

S.o.s. Math: Quadratic Equations

For Students 9th - 10th Standards
This lesson shows a step-by-step procedure for solving a quadratic equation by completing the square.
Unit Plan
Mangahigh

Mangahigh: Algebra: Use Identities to Solve Problems

For Students 9th - 10th
Students explore the concept of identities by working through an online tutorial and then attempting a ten question quiz that increases in difficulty as questions are answered correctly.
Whiteboard
ClassFlow

Class Flow: Solve by Completing the Square

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This flipchart explores the steps for solving quadratics by completing the square.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Vertex Form of a Quadratic Equation

For Students 8th - 9th
[Free Registration/Login may be required to access all resource tools.] Learn to complete the square in order to write quadratic equations in vertex form.
Unit Plan
Khan Academy

Khan Academy: Completing the Square (Intermediate)

For Students 9th - 10th
Solve quadratic equations of the form x^2+bx+c by completing the square. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Factor Polynomials Using Special Products

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson covers factoring perfect square trinomials and the difference of squares.
Unit Plan
Texas A&M University

Wtamu Virtual Math Lab: College Algebra: Quadratic Equations

For Students 9th - 10th Standards
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...
Activity
Help Algebra

Help algebra.com: Factoring Polynomials

For Students 9th - 10th
Several types of factoring are covered in this article, including common factors, grouping, special factors, and completing the square. The examples include detailed explanations of the factoring process.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Vertex Form of a Quadratic Equation

For Students 8th - 9th Standards
[Free Registration/Login may be required to access all resource tools.] Learn to complete the square in order to write quadratic equations in vertex form.