Grade 9 Lessons

Quarter 1

Video Lessons

Illustrating Quadratic Equations

Introduction

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Solving Quadratic Equations

Method 1: by Extracting the Square Roots

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Solving Quadratic Equations

Method 2: by Factoring

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Solving Quadratic Equations

Method 3: by Completing the Square

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Solving Quadratic Equations

Method 4: Using the Quadratic Formula

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Nature of Roots using the Discriminant

Method 4: Using the Quadratic Formula = b² - 4ac

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Sum and the Product of the Roots of Quadratic Equations

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Solving Quadratic Equations Transformable to Quadratic Equations

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Solving Quadratic Equations Transformable to Quadratic Equations (Part 2)

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Mathematical Model - Geometry

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Mathematical Model - Geometry (Part 2)

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Illustrating
Quadratic Inequalities

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Solving
Quadratic Inequalities

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Models of Quadratic Function

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Representing Quadratic Function through Table of Values and Graphs

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Representing Quadratic Function using Equation

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Transforming Quadratic Functions from General Form to Standard/Vertex Form and vice versa

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Graphs of Quadratic Function

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Characteristics of the Graphs of Quadratic Function

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Effects of Changing the Values of a, h and k

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Equation of Quadratic Function given Table of Values

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Equation of Quadratic Function given Graphs and Zeros

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