# Discriminant

## Determine the number of real roots using the discriminant

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.

## Using the Discriminant

by CK-12 //at grade
This lesson uses the discriminant to determine how many real solutions a quadratic equation has.
MEMORY METER
This indicates how strong in your memory this concept is
1

## Solutions Using the Discriminant

by CK-12 //at grade
Given a quadratic equation, find its discriminant and use the result to determine the nature of the solutions.
MEMORY METER
This indicates how strong in your memory this concept is
0
• PLIX

## Discriminant

by CK-12 //at grade
Discriminant Interactive
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

## Discriminant for Types of Solutions for a Quadratic

by CK-12 //at grade
Uses the discriminant to determine how many real solution are possible for a quadratic equation.
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

## The Discriminant: A Sample Application

by CK-12 //at grade
This video demonstrates a sample use of the discriminant.
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

## The Discriminant: An Explanation of the Concept

by CK-12 //at grade
This video provides an explanation of the concept of the discriminant.
MEMORY METER
This indicates how strong in your memory this concept is
0
• 1
• Critical Thinking

## Solutions Using the Discriminant Discussion Questions

by CK-12 //at grade
A list of student-submitted discussion questions for Solutions Using the Discriminant.
MEMORY METER
This indicates how strong in your memory this concept is
0
• Real World Application

## It's a Bird, It's a Plane... It's a Bungee Jumper!

by CK-12 //at grade
Find out how understanding the discriminant can keep you safe when bungee jumping.
MEMORY METER
This indicates how strong in your memory this concept is
0
• Real World Application

## Telescope

by CK-12 //at grade
Students will apply their understanding of polynomials and quadratics to better understand the making of a mirror for an astronomer's telescope.
MEMORY METER
This indicates how strong in your memory this concept is
1
• 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.
MEMORY METER
This indicates how strong in your memory this concept is
1