For many Secondary 3 A-Maths students, this topic called Factor - Remainder theorem or Polynomials is usually introduced in the first 3 months of the year.
In this topic, they are introduced to the method to find the factors of a cubic equation so that it can be solved. They also learnt when and how to use Remainder theorem to find the remainder when a dividend is divided by a divisor.
They also know to rewrite an expression into function f(x).
In the following two videos, I use less than 6 minutes to bring across the concepts of Factor theorem and Remainder theorem.
I hope through these videos, you will have a better understanding of these two concepts.
Also, I have included a page which contains all the O-Level Maths videos I have produced since 2007.