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Essential Mathematics Year 9

Solving simple quadratic equations

Introduction to quadratic equations and graphs

12 Chapters
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Introduction to q…
About this lesson
This is the second video in the Year 9 Mathematics series looking at quadratic equations. I love quadratics and this video will give a sense of why. Solving simple quadratic equations is awesome. When you identify them as being of the form ax^2 -d=0, you know that you can factorise, use DOPS, the null factor law and then you have the crossing points on your x-axis, otherwise known as your solutions. OK. It's hard to explain in writing and so this video looks at a number of examples and uses DESMOS.com to show you what a solutions is and how to find it for simple quadratic equations.
Lesson chapters
  1. Welcome
  2. Learning objectives
  3. Recap of past learning
  4. Why do we only want the points where it crossed the x-axis?
  5. Lots of forms of quadratic equations
  6. Solving ax^2-d=0
  7. Taking the square root gives us two values
  8. Example 1
  9. Example 2
  10. Example 3
  11. The return of DOPS
  12. Final words
Video details
  • Title Solving simple quadratic equations
  • Section Introduction to quadratic equations and graphs
  • Course Essential Mathematics Year 9

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