Stage 23 · Quadratic Functions

23.3.4 The Vertex Formula

23.3 The Three Essentials: Vertex, Axis, and Opening

Point 4 of 6

23.3.4 The Vertex Formula

Core idea

The shortcut: the axis is x=−b/2a and the vertex's height is (4ac−b²)/4a, ready to plug in directly.

Module goal. Move from vertex form to the general form, and master how to find the three geometric essentials along with the graph's properties.
eastmath.com · 23.3 The Three Essentials: Vertex, Axis, and Opening · 23.3.4 The Vertex Formula