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Expanding and factorising

Free Printable Expanding and factorising PDF Worksheets, Revision Guide & GCSE Past Paper Questions (Grade 4)

Download free expanding and factorising worksheets (PDF), GCSE maths past paper questions and worked solutions for Expanding and factorising (4J). This is a Grade 4 algebra topic from the GCSE questions by topic collection for Foundation and Higher tier crossover GCSE Maths (Edexcel, AQA, OCR and IGCSE).

The free PDF worksheets table below brings together printable question booklets (Qs) and worked answers or mark schemes (Ans) from Maths Genie, Corbett Maths, Maths Made Easy, Naiker Maths, Hannah Kettle, Dr Austin, GCSE Maths Rocket, Metatutor, E Classroom and PMT, along with past paper question booklets.

Below the worksheet links you can read our expanding and factorising revision notes and worked examples with diagrams, try real GCSE past paper expanding and factorising questions with step-by-step solutions, or download a PDF of all expanding and factorising worksheet links.

Free Expanding and factorising PDF Worksheets & Answers

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GCSE Maths Grade 4 Revision Notes & Method

Guide to Expanding and factorising: Explanation, Diagrams & Worked Examples

Download Printable One Page Guide (PDF)

Explanation:

To expand a single bracket, multiply the term outside the bracket by every term inside the bracket. When expanding and simplifying two separate brackets, be careful with a negative sign in front of the second bracket (e.g. −2(x − 3) = −2x + 6).

Factorising is the reverse of expanding: find the highest common factor (HCF) of the numbers and the letters, write it outside a bracket, and divide each term by that HCF to find what goes inside. Check by expanding back out.

Example 1: Expand and simplify 4(2x + 3) − 3(x − 5)

Solution:

Expand 1st bracket: 4(2x + 3) = 8x + 12
Expand 2nd bracket: −3(x − 5) = −3x + 15
Collect like terms: 8x − 3x + 12 + 15
Answer: 5x + 27

Example 2: Factorise fully 12x2y − 18xy3

Solution:

HCF of 12 and 18 is 6.
Common letters: xy → full HCF = 6xy
Divide each term by 6xy: 2x and −3y2
Answer: 6xy(2x − 3y2)
Scanned GCSE Exam Questions & Worked Solutions

GCSE Past Paper Expanding and factorising Questions & Answers

Past Paper Example 1 GCSE May 2019 1F Q16 2 marks
(a) Expand 5(2m – 3) (1) (b) Factorise 3n + 12 (1)
(a) Expand 5(2m - 3) [1 mark]
(b) Factorise 3n + 12 [1 mark]
Worked Solution & Mark Scheme (2 marks)
Part (a) Solution:
5 × 2m – 5 × 3 = 10m – 15 B1
Answer (a): 10m - 15
Part (b) Solution:
3(n + 4)
Answer (b): 3(n + 4)
Past Paper Example 2 GCSE Nov 2017 3F Q17 3 marks
(a) Factorise 4m + 12. (1) (b) Complete: 5y is a [term] in the [expression] 3x + 5y. (2)
(a) Factorise 4m + 12 [1 mark]
(b) Choose two words from the box above to make this statement correct. [2 marks]
expressionequationformulaidentityinequalitytermfactormultiple
Worked Solution & Mark Scheme (3 marks)
Part (a) Solution:
4(m + 3)
Answer (a): 4(m + 3)
Part (b) Solution:
5y is a term in the expression 3x + 5y M1 A1
Answer (b): term, expression
Past Paper Example 3 GCSE Nov 2024 2F Q19 4 marks
(a) Factorise fully 15w² – 5w (2)
(b) On the number line, show –2 < x ⩽ 4 (2)
(a) Factorise fully 15w2 - 5w [2 marks]
(b) On the number line below, show the set of values of x for which –2 < x ≤ 4 [2 marks]
–4–3–2–10123456
Worked Solution & Mark Scheme (4 marks)
Part (a) Solution:
Difference of two squares: a2 - b2 = (a + b)(a - b) M1
e.g. m2 - 9 = (m + 3)(m - 3)
Answer: 5w(3w - 1) A1
Answer (a): 5w(3w - 1)
Part (b) Solution:
Open circle at –2, closed circle at 4, joined by a line M1 A1
–4–3–2–10123456
Answer (b): Open circle at –2, closed circle at 4, joined by a line

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