tag:blogger.com,1999:blog-4764174771976602252.post1290195981697764367..comments2012-08-24T22:48:53.206+08:00Comments on 2012 S2-08 Maths Blog: Quadratic - completing the squareNur Johari Bin Sallehnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-4764174771976602252.post-19720387657812377812012-04-02T13:17:52.426+08:002012-04-02T13:17:52.426+08:00Why do we use completing the square? (purpose?)
It...Why do we use completing the square? (purpose?)<br />It not only shows you the vertex, but makes it easer to solve.<br /><br />There are also times when the form ax^2 + bx + c may be a part of a larger problem and rearranging it as a(x+d)^@+e makes the solution easier, because x only appears once.<br /><br />For example "x" may itself be a function (like cos(z)) and rearranging it may open up a path to a better solution.<br /><br />Also Completing the Square is the first step in the Derivation of the Quadratic FormulaYong Ming Yanghttp://www.blogger.com/profile/13426948759440242446noreply@blogger.com