This key facts covers The "Two Numbers" Method within Factorising for GCSE Mathematics. Revise Factorising in Algebra for GCSE Mathematics with 12 exam-style questions and 3 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 9 of 13 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 13
Practice
12 questions
Recall
3 flashcards
The "Two Numbers" Method
For x² + bx + c, find two numbers that:
MULTIPLY to give c
ADD to give b
Example: x² + 5x + 6
- Need: multiply to 6, add to 5
- Numbers: 2 and 3 (2×3=6, 2+3=5)
- Answer: (x + 2)(x + 3)
Keep building this topic
Read this section alongside the surrounding pages in Factorising. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Factorising
Which is the correct factorisation of 6x + 15?
A student factorises x² + 5x + 4 as (x + 4)(x + 4). Explain why this is incorrect and give the correct factorisation.
Quick Recall Flashcards
12 questions on Factorising — practise free
Instant marking, adaptive difficulty, and 3 spaced repetition flashcards. Free until your GCSEs.
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