# 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

This lesson uses the discriminant to determine how many real solutions a quadratic equation has.
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## Solutions Using the Discriminant

Given a quadratic equation, find its discriminant and use the result to determine the nature of the solutions.
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• PLIX

## Discriminant

Discriminant Interactive
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• Video

## Discriminant for Types of Solutions for a Quadratic

Uses the discriminant to determine how many real solution are possible for a quadratic equation.
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• Video

## The Discriminant: A Sample Application

This video demonstrates a sample use of the discriminant.
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## The Discriminant: An Explanation of the Concept

This video provides an explanation of the concept of the discriminant.
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• Critical Thinking

## Solutions Using the Discriminant Discussion Questions

A list of student-submitted discussion questions for Solutions Using the Discriminant.
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• Real World Application

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

Find out how understanding the discriminant can keep you safe when bungee jumping.
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• Real World Application

## Telescope

Students will apply their understanding of polynomials and quadratics to better understand the making of a mirror for an astronomer's telescope.
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• Study Guide