Paper 1 · Algebra
⏱ Tested in 3 exam questions since 2018
Lesson 7 of 23
Algebra 7 – Rational Inequalities
You’ll learn
- Multiply a fraction inequality by the squared denominator to keep its direction
- Reduce to a quadratic inequality and solve it with the parabola sketch
- Exclude any x-value that makes the original denominator zero
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
- 2023 P1 Q2(a) — deferred
- 2022 P1 Q3(c) — deferred
- 2018 P1 Q1(b)
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