SPM Form 4 Add Maths_Chapter 03 Quadratic Functions

In this chapter, students should know how to determine the maximum point or minimum point by using the completing square method. Students should bear in mind that the general formula for completing square is "f(x) = a(x+p)² +q".

To determine the maximum and minimum point, students should derive the given equation into the general formula [f(x) = a(x+p)² +q]. When "a" is a positive value (aka "a >0"), the obtained graph "smile" such as "∪", thus is a minimum point. Whereas, when "a" is a negative value (aka "a<0"), the obtained graph will be a sad face such as "∩", thus students will get a maximum point.

The video below shows 2 Past Year Questions on Quadratic Functions. Students will have a clearer understanding in applying the general formula.

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