Quadratic Inequalities (HSC SSCE Mathematics Advanced): Flashcards

Compares quadratic function to constant/function via inequality symbol

$f(x) = ax^2 + bx + c$ where $a \neq 0$

Points where parabola crosses the line

$\Delta = b^2 - 4ac$

Two distinct boundary points

One boundary point

No boundary points

Above the line $y = k$

When inequality uses $\leq$ or $\geq$

Range(s) of values, not discrete points