- Study Helper
This question doesn't make sense at A-Level context. Binomial expansion is done about the point at A-Level, so naturally no matter how you rewrite the end result, it will always be an expansion in increasing powers of , not .
Even if you 'take x out of the bracket' you will ultimately have a series that increases in powers of .
If this question genuinely wants you to obtain the expansion in increasing powers of , then the expansion needs to happen about the point . This is way beyond A-Level and known as 'Laurent series'.