Paper 1 · Algebra
⏱ Tested in 1 exam question since 2025
Lesson 20 of 23
Algebra 20 – Pascal’s triangle
You’ll learn
- Build Pascal's triangle row by row and pick row n + 1 for (x + y)ⁿ
- Expand (x + y)ⁿ with descending x powers and ascending y powers
- Alternate the signs when expanding (x − y)ⁿ
- Simplify terms like 4·(2x)³·(3y), cubing the coefficient with the variable
Most recent exam questions
- 2025 P1 Q5(a) — deferred
💬 Stuck on something in this lesson?
Send your question with this lesson’s name attached — you’ll get a reply by email.