AQA GCSE Unit 2 Maths June 2011 Higher (2 of 3)

preview_player

Показать описание

Рекомендации по теме

Комментарии

You know the second term in terms of the first (as you have to double the previous number and subtract 4) so b = 2a - 4. You also know the third term, c, in terms of b as again you double b and subtract 4. Hence c = 2b - 4. Then notice that the examiner wants a formula for c with a terms in it. So as c = 2b - 4 and b = 2a - 4 we can substitute b in terms of a in to get c = 2(2a-4) - 4 which when we expand we get c= 4a - 12 and when we factorise we get c = 4(a-3) as required. Hope helps.

HEGARTYMATHS

literally can't get q11 round my head

mizzymsp

Will you be doing any of the 2012 papers?

SarahLeanneWarbyUK