Completing the Square

Complete the square for monic quadratics with integer coefficients, e.g. rewriting $x^2+bx+c$ as $(x+p)^2+q$.

Worksheet Builder All resources ☕ Shout us a flat white Download All

Te reo Māori terms

click each term to open in Te Aka

Learning objective overview

Master Teaching Guide coverage for this objective.

Current NZC (2007)
  • NA6-5
New NZC (2026)
  • NZC26-P4-ALG-ER-P-Y10-03

Resources

Terminology

  • completing the square
  • completed square form
  • monic quadratic
  • leading coefficient
  • vertex form
  • turning point
  • $(x+p)^2+q$

Task goals

  • Foundation: Complete the square for monic quadratics with integer coefficients, e.g. rewriting $x^2+bx+c$ as $(x+p)^2+q$.
  • Proficient: Complete the square for quadratics with a leading coefficient not equal to 1, and use the result to state the turning point of the corresponding parabola.
  • Excellence: Use completing the square to solve quadratic equations exactly (including irrational roots), derive the quadratic formula, or solve optimisation problems requiring a vertex-form argument.

Where this fits

What leads into this objective, and where it goes next.

Explore the whole sequence →