Quadratic Inequalities (Edexcel A-Level Mathematics): Flashcards

Inequalities involving a quadratic expression (term with $x^2$)

Find range of values for $x$ that makes inequality true

Write in standard form with one side equal to 0

Find roots of $ax^2 + bx + c = 0$

Divide number line into intervals

Open circles

Closed circles

When quadratic doesn't factorize easily

Opens upward

Opens downward

Negative regions

Positive regions

Inequality solving mode, degree 2, input coefficients