A-Maths: Solve a Cubic Equation by Synthetic Division or Comparing Coefficients - video


Solving a cubic equation is similar in some aspects to solving a quadratic equation, factorisation is in action.

In the two videos, I show you the step by step approach I took to solve a cubic equation either by synthetic division or comparing coefficients.

This concept is usually covered in Secondary 3 Additional Maths syllabus under Factor and Remainder Theorem.

Step 1 (same for both methods) : Guess and Check the first factor (with the help of the calculator).

Step 2: Find the Quadratic Factor.

Leave a comment to share with me which method do you prefer or usually use? I look forward to your comment!

 Video 1: GCE O-Level A-Maths: Solve a Cubic Equation by Synthetic Division

Direct link: https://www.youtube.com/watch?v=CqCdD9a8q4c

Video 2: GCE O-Level A-Maths: Solve a Cubic Equation by Comparing Coefficients

Direct link: https://www.youtube.com/watch?v=6iqG74I07v4

Related Post

A-Maths: Factor-Remainder Theorem Introduction Videos 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 ...
O level A-Math: 2 Different Approaches To Solve Identity Question In Factor - Remainder Theorem In O level Additional Mathematics, there is a small section on Identity inside the topic of Factor & Remainder Theorem. Today I am going to share ...
Does Stubborness Earn You More Marks? I was doing Factor, Remainder Theorem with one of my students. She's a brilliant girl but has yet to achieve the results she truly deserves. I think s...
A-Maths: Forming a Polynomial Equation, Given its Roots It is simple to follow the steps of solving a cubic equation which includes finding the linear factor by using calculator and the quadratic factor by ...

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

Leave a reply