IB skill practice

Complete the square for quadratic functions

Convert an expanded quadratic into vertex form, then identify the vertex, axis of symmetry, and range using IB-style reasoning.

Paper 1 6 marks Difficulty 2

Find the minimum from completed square form

Complete the square for \(f(x)=x^{2} + 2x\), then state the minimum or maximum point and the range.

Worked practice: quadratic features

Use the vertex-form information to state the graph features in order.