Quadratic Inequalities (Grade 12 NSC Matric Mathematics): Flashcards
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Quadratic inequality definition
Quadratic inequality definition
Quadratic expression with inequality symbol (>, <, ≥, ≤)
Condition in
Condition in
Ensures we have a quadratic expression
Solution type for quadratic inequality
Solution type for quadratic inequality
Range of x-values, not specific values
Critical points/values
Critical points/values
Roots or x-intercepts where parabola crosses x-axis
When to reverse inequality sign
When to reverse inequality sign
When multiplying/dividing by negative number
Parabola direction when
Parabola direction when
Opens upward
Parabola direction when
Parabola direction when
Opens downward
Where to select for or
Where to select for or
Intervals where graph is above x-axis
Where to select for or
Where to select for or
Intervals where graph is below x-axis
Strict (< or >) vs non-strict (≤ or ≥) inequality
Strict (< or >) vs non-strict (≤ or ≥) inequality
Strict excludes, non-strict includes critical points