Maths help

Can anyone explain to me how do these questions, do I first use bionomial expansion then complete the square or something like that?

Reply 1

Notnek

Original post by Yip9090

Can anyone explain to me how do these questions, do I first use bionomial expansion then complete the square or something like that?

You do need to use binomial expansion. Try this and please post all your working if you get stuck.

Reply 2

Towcestermaths

Original post by Yip9090

Can anyone explain to me how do these questions, do I first use bionomial expansion then complete the square or something like that?

You would certainly want to use the binomial expansion if the powers were higher but for these two it might be simpler to just multiply them out.

Reply 3

Notnek

Original post by Towcestermaths

You would certainly want to use the binomial expansion if the powers were higher but for these two it might be simpler to just multiply them out.

Binomial expansion is just a quick way of expanding brackets. Especially for the first one, an A Level student should definitely be using binomial expansion IMO. If they are not then they're probably not confident enough with binomial expansion than they should be.

Reply 4

Towcestermaths

Original post by Notnek

Perhaps. However I am certainly very confident with binomial expansion but would still multiply them out as i think its probably quicker. Even the first one only needs squaring twice.