1. Lesson 8

1.3. Refresher

Mathematics 20-1 Module 4

Module 4: Quadratic Equations and Inequalities

 

Refresher

 

Use the following to review the Launch topics you experienced difficulties with in the Are You Ready? section.

 

This is a play button that opens “Multiplying and dividing negative numbers.”

Khan Academy (CC BY-NC-SA 3.0)

For more information about interpreting inequality statements, watch “Multiplying and Dividing Negative Numbers.”

 


 

This is a play button that opens “Inequalities on a number line.”

Khan Academy (CC BY-NC-SA 3.0)

Also watch “Inequalities on a Number Line.”

 



This is a play button that opens Inequality.

The Inequality website reviews how to graph inequalities on a number line and has an applet at the bottom of the page to practise graphing more inequalities.

 


To review how to factor quadratic equations, you may find the following helpful:

  • Use Solving Quadratic Equations: Factoring to review your factoring skills. Once you have selected Solving Quadratic Equations: Factoring, choose the Examples button, shaped like a puzzle piece, at the top of the page. Work through the examples provided.

     
    This is a play button that opens Solving Quadratic Equations: Factoring.


  • Go back to Lessons 2 and 4 of this module to review your factoring skills.
This is a play button that opens The Quadratic Formula: Problem Situations.

Use The Quadratic Formula: Problem Situations to review the use of the quadratic formula. After choosing The Quadratic Formula, select the Examples button, shaped like a puzzle piece, at the top of the page. Work through all four of the examples provided.

Go back to the Are You Ready? section and try the questions again. If you are still having difficulty, contact your teacher.