AQA FM: Binomial Expansion Question: Find the first 3 terms in the expansion, in ascending powers of x, of: (3 - x/9)^6 Give the terms in their simplest form. Key exam skill: Use binomial coefficients and take the first 3 terms only. For power 6, the first three coefficients are: 1, 6, 15 So: (3 - x/9)^6 First term: 3^6 = 729 Second term: 6 x 3^5 x (-x/9) = -162x Third term: 15 x 3^4 x (x^2/81) = 15x^2 Final answer: 729 - 162x 15x^2 Save this for revision. Follow for more AQA Level 2 Further Mat

This tricks makes (a+b)⁶ Expansion easy!