Paper 1 · Algebra
⏱ Tested in 5+ recent exam questions
Lesson 14 of 22
LCOL Algebra 14: Solving Quadratic Equations
You’ll learn
- Solve a quadratic by factorising and letting each factor equal zero
- Recognise that there are usually two solutions
Formula used
Null factor law
If a × b = 0 then a = 0 or b = 0
On page 20 of the log tables — read it off, don’t memorise.Most recent exam questions
- 2025 P1 Q9(b)(v)
- 2024 P1 Q9(d)(ii)
- 2022 P1 Q10(a)(iii)
- 2022 P1 Q6(c)
- 2021 P1 Q5(b)
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