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Solving Quadratic Equations by using the Quadratic Formula

Solving Quadratic Equations by using the Quadratic Formula

Description:
  1. Introduce the quadratic formula (), and discuss how to identify quadratic equations that should be solved using the quadratic equation.

  2. Present how to use the quadratic formula to solve for a quadratic equation, reviewing order of operations along the way.

  3. Introduce the discriminant of the quadratic formula (b2 – 4ac), and how to use it to determine the number of real solutions of a quadratic equation.

This packet should help a learner seeking to understand how to solve for quadratic equations by using the quadratic formula.

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Tutorial

Introduction to the Quadratic Formula

This video introduces the quadratic formula and explains how it is based on completing the square.

Source: ChristinaPease

Prime Quadratics

This video discusses how to determine when to use the quadratic equation.

Source: ChristinaPease

Unreal Roots

This video introduces the concept of unreal roots.

Source: ChristinaPease

The Discriminant

This video introduces the discriminant and shows how to use it to determine the nature of the solutions to a quadratic equation.

Source: ChristinaPease

Using the Quadratic Formula

This video demonstrates how to use the quadratic formula to solve a quadratic equation.

Source: ChristinaPease

Practice Problems

This video demonstrates how to use the quadratic formula to solve 3 different example problems.

Source: ChristinaPease