E-Maths: Completing Square Step-by-Step Video (Part 1)

I was talking to my Secondary 3 students in my O-Level E Maths weekly tuition class on Quadratic when they expressed disgust for the technique of Completing Square.

A similar thing happened when Completing Square was an alternative method offered to Equation of Circle concept. There was a collective yucks from the class.

I hope my video will ease the yuckness many students find with completing square technique and give you some hope to conquer it!

Test out your understanding by leaving your answer for the bonus question in the comments below!

Direct link to video: http://www.youtube.com/watch?v=bf8PfyP2h74

Related Post

E-Maths Note: Quadratic Equations & Graphs Series For those in Sec 3s, you will be learning more about Quadratic Graphs. Not so much of the drawing like in Sec 2s, but more of indepth understanding. ...
A-Maths: Quadratic Equation - Sum & Product of Roots Quadratic Equation is an important topic in O-Level Elementary & Additional Maths. Different areas are covered for each Math. For example in Ad...
E-Maths Note: Quadratic Equations & Graphs Series Revisit I have discussed about Quadratic Equations and Graphs previously in Features of Quadratic Equations and Graphs , Different representations of quadrati...
Quadratic Equation Discriminant Proving Question I realize many students have a challenge with presenting the solution of proving question. I am going to illustrate the correct way using the followin...
Quadratic Equations Song by St Margaret's Girls Recently in my Secondary 3 Additional Maths Weekly Tuition Class, I was checking with my students if they have learnt the Quadratic Formula. One boy '...

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! :)

9 Responses to E-Maths: Completing Square Step-by-Step Video (Part 1)

  1. x^2 - 7x - 5
    = (x-3.5)^2 - 3.5^2 -5
    = (x-3.5)^2 + 12.25 - 5
    = (x-3.5)^2 + 7.25

    Is this the answer?


    Ai Ling Reply:

    in front of 12.25 should be a negative sign.


    Andrew Reply:

    is this secondary 3 mathes?


    Ai Ling Reply:

    Usually Sec 3 or even Sec 2 students would have learnt it by first half of the year.

  2. I'm from malaysia and is there a way to get your books?


    Ai Ling Reply:

    I would suggest to check if Popular Malaysia can order from Popular Singapore.
    Otherwise, come over to Singapore for holidays and buy books too :)


Leave a reply