E-Maths Note: Quadratic Equations & Graphs


3 Different representations of a quadratic equation & its significance

y=3x^2 - x + 5 : typical quadratic equation : Max/Min & instant answer to y-intercept
y=(x+4)^2 - 1 : Completed Squ form : Great for solving equation

y=(x-3)(x+2) : Instant answer to x-intercepts aka roots

Since we are on this topic of quadratic, one of the most important aspects is quadratic graphs.
There is a software which I use often for plotting of all sorts of graphs!
Yes, what you need to do is to "feed" the software with the equation of the graph that you intend to plot!

Get your free software for plotting by clicking here >>
Graphmatica Software

Now you know how your teachers plot their nice nice graphs :)

Related Post

A-Math: Quadratic Equation & Discriminant (Plus Common Mistakes & Counter Measures) Commonly asked in school and 'O' Level Examinations, many students also commit to commonly made mistakes. Watch the video (5 minutes) and see how you ...
E-Math: Quadratic Checklist As I'm writing this post, we are only 89 days away from GCE 'O' Level Elementary Maths Paper 1. Personally I think in this last phase of preparatio...
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...
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 Comp...
A-Math P & C Qn! The no. of applicants for a job is 15. (i)Calculate the no. of ways in which 6 applicants can be selceted for the interview. The six selected appli...

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! :)

5 Responses to E-Maths Note: Quadratic Equations & Graphs

Leave a reply