Stage 23 · Quadratic Functions

23.5.5 One Unified View of the Three

23.5 Quadratic Function × Equation × Inequality

Point 5 of 5

23.5.5 One Unified View of the Three

Core idea

Function, equation, and inequality are one family: the graph is the map, the roots are the landmarks, and the solution set is the stretch of road.

Module goal. Connect the parabola's relationship with the x-axis to the roots of a quadratic equation and the solution set of a quadratic inequality.
eastmath.com · 23.5 Quadratic Function × Equation × Inequality · 23.5.5 One Unified View of the Three