1 / 5

Quadratic Functions(2)

Quadratic Functions(2). Solving quadratic equations through factorising. Checking to see if a quadratic equation will factorise. Solving through factorisation. Solving a quadratic equation through factorisation is usually the first choice method as it is the easiest.

geraldo
Download Presentation

Quadratic Functions(2)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Quadratic Functions(2) Solving quadratic equations through factorising. Checking to see if a quadratic equation will factorise.

  2. Solving through factorisation Solving a quadratic equation through factorisation is usually the first choice method as it is the easiest. However, not all quadratic equations factorise and if they don’t, you need to use a different method.

  3. Trick If you substitute the values of a, b and c into the expression b2 – 4ac and you get a square number then the equation definitely factorises, otherwise, it doesn’t.

  4. Trick – an example a=5 b=14 c=-3 b2 – 4ac Discriminant (14)2 – 4 x (5) x (-3) 196 – (-60) = 256 This is a square number, so quadratic does factorise

  5. Solving Quadratic Equations • We will now look at solving quadratic equations using factorisation

More Related