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

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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?

    Reply

    Ai Ling Reply:

    in front of 12.25 should be a negative sign.

    Reply

    Andrew Reply:

    is this secondary 3 mathes?

    Reply

    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?

    Reply

    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 :)

    Reply

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