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Henrico County Public Schools, Virginia

 
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Module - Exploring Quadratic Functions and Inequalities
Lesson 4 - Quadratic Formula and Discriminant
Objective

The student will be able to solve quadratic equations by using the quadratic formula and determine the nature of the roots of quadratic equations.

The Discriminant

Use the sliders to change the values of a, b, and c.

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Discriminant

In the quadractic equation ax2 + bx + c = 0, slide the values of a, b and c and observe the roots of the quadractic.

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SOL

AII.4b - The student will solve, algebraically and graphically, quadratic equations over the set of complex numbers.  

 

Common Core Standards

Warm-up
  1. ExamView: Solving Equations by Completing the Square Review
Lessons
  1. Notes: Solving Quadratic Equations by the Quadratic Formula (ppt)
Videos

 

Explore Learning

 

Geogebra

 

Internet Sites
  1. Video Tutor - Discriminant
Tasks

 

Practice
  1. Homework: Solving Quadratic Equations by the Quadratic Formula #1-9 (pdf)
Assessment
  1. ExamView: Quadratic Formula and Discriminant Quiz
Other

 

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