Sectieoverzicht

  • A quadratic expression is any expression where the variable has a highest power (or degree) of two. \(a{x}^{2}+bx, {x}^{2}, {a}^{2}-{b}^{2}\) and \(a{x}^{2}+bx+c\) are all examples of quadratic expressions. We use the expression \(a{x}^{2}+bx+c\) so often that it has a special name.  It is called a quadratic trinomial in standard form. 
    There is more than one way to factorise trinomials, these methods are discussed in the next videos.
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      Methods to factorise quadratics

      In the next 2 videos the different methods to factorise quadratics are discussed using examples. Whichever method you use to factorise quadratics make sure you master it! It is an extremely important concept that you will come back to again to be successful in some of the other topics in Mathematics. 

      The next video shows an alternate method involving grouping that you can use to factorise quadratics.
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      Find the factors

      Click on the exercise Factoring quadratics to test your knowledge on finding factors of trinomials.

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      For enrichment

      When \(a\) the coeffcient of \({x}^{2}\) is not \(1\) you will have to use the factors of \(a\) and the constant \(c\) to factorise the quadratic trinomial. 

      There is an interesting method for factorising these types of trinomials that you can read about here.