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Solve quadratic equations using the formula

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

by CK-12 //at grade

Use the quadratic formula to solve equations and find the vertex of parabolas.

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Deriving and Using the Quadratic Formula

by CK-12 //at grade

This lesson covers deriving the quadratic formula and using it to solve any quadratic equation.

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• Video

by CK-12 //at grade

Uses the quadratic formula to solve a quadratic equation.

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• Video

by CK-12 //at grade

Shows how to use the Quadratic Formula to solve a quadratic equation, one more way to solve quadratic equations.

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• Video

The Quadratic Formula: A Sample Application

by CK-12 //at grade

This video demonstrates a sample use of the quadratic formula.

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• Video

The Quadratic Formula: An Explanation of the Concept

by CK-12 //at grade

This video provides an explanation of the concept of the quadratic formula.

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by CK-12 //at grade

Quiz for Using Quadratic Formula to Solve Quadratic Equations.

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• Practice
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by CK-12 //at grade
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• Critical Thinking

Quadratic Formula Discussion Questions

by CK-12 //at grade

A list of student-submitted discussion questions for Quadratic Formula.

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by CK-12 //at grade

To stimulate the critical thinking skills required to assess the validity of statements about the key concept using an Agree/Disagree Table.

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by CK-12 //at grade

To stimulate the critical thinking skills required to assess the validity of statements about the key concept using an Agree/Disagree Table.

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Deriving and Using the Quadratic Formula Double Entry Diary

by CK-12 //at grade

To have students generate connections between specific points in the concept’s reading and their own personal experiences using a Double Entry Diary.

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Quadratic Formula Four Square Concept Matrix

by CK-12 //at grade

Summarize the main idea of the Concept, create visual aids or make notes about formulas and create connections to real-world situations.

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• Real World Application

Fireworks

by CK-12 //at grade

When’s the best time to blow up fireworks?

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• Study Guide

Solving Quadratic Equations Study Guide

by CK-12 //at grade

This study guide gives an overview of methods to solve quadratic functions: solving by square roots (special case), completing the square, using the quadratic formula. It also looks at using the discriminant to determine the number of solutions.

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