Journal

Understanding Quadratic Functions for First-Time Learners
A quadratic function is one of the first curves students meet that refuses to behave like a straight line. Once you learn its shape, though, the same pattern…
Practice Problems for Converting Quadratics to Vertex Form
Students preparing for the HSC in New South Wales, the VCE in Victoria, or the QCE in Queensland spend countless hours refining techniques of algebra.…
Using the Discriminant to Count Quadratic Equation Solutions
Quadratic equations show up in classrooms from Year 10 Mathematics through to Year 12 Specialist Maths, no matter whether you sit the VCE in Melbourne, the HSC…
How to Find the Roots of a Quadratic Equation
A quadratic equation has the general form (ax^2+bx+c=0), where (a\neq0). Its roots are the values of (x) that make the equation equal to zero. They are also…
Solving Quadratic Equations by Factoring Explained
A quadratic equation contains a squared variable, usually written in the form (ax^2+bx+c=0). One of the quickest ways to solve many such equations is…
Why Vertex Form Matters for Real-World Problems
Quadratic equations appear whenever a situation rises and falls, grows and shrinks, or reaches a clear best or worst value. A ball follows a curved path, the…
Reading Quadratics in Two Useful Forms
A quadratic equation can look quite different while describing exactly the same parabola. The two formats students meet most often are standard form and vertex…
Graphing Parabolas: Finding the Vertex and Axis of Symmetry
A parabola is one of the most recognisable shapes in mathematics, appearing whenever a quantity is squared and then adjusted. From the gentle arc of a kicked…
Understanding the quadratic formula and when to use it
Quadratic equations appear whenever an unknown is squared. They describe curved graphs, changing areas, projectile paths and many optimisation problems. A…
Completing the square step by step for Australian students
Working through quadratic equations is a routine part of senior secondary mathematics across Australia, whether a student is preparing for the HSC in Sydney,…