The technique of completing the square can be used when the equation cannot be factorised.
As the steps are the same each time, this pattern lends itself to a formula, the formula known as “the quadratic formula”

Note: I changed the +7 to a – 7 in case you are wondering what I am talking about in the slidecast!!!

lesson notes: 09 completing the square

audio: 09 completing the square

slidecast: