Paper 1 · Algebra
⏱ Tested in 3 exam questions since 2021
Lesson 6 of 23
Algebra 6 – Inequalities
You’ll learn
- Solve quadratic inequalities by factorising, then sketching the parabola
- Read the answer region from the sketch: ≤ 0 inside the roots, ≥ 0 outside
- Multiply by −1 and flip the sign when the x² coefficient is negative
- Match strict vs non-strict inequalities to including the boundary roots
Formula used
Roots of the quadratic equation
x = (-b ± √(b² − 4ac)) / 2a
On page 20 of the log tables — read it off, don’t memorise.Most recent exam questions
- 2026 P1 Q7(c)
- 2026 P2 Q4(b)
- 2025 P1 Q7(a)(v)
- 2024 P1 Q10(b)
- 2021 P1 Q5(a)(ii)
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