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# How would I expand this? :/

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1. (1+x+x^2) ^1/2

The question says expand as a series so I assumed it means using the binomial expansion for fractional powers, I'v attempted it, but I know its wrong, and I may sound stupid, but I'v never used binomial when there is three terms in the bracket! Lol any help will be appriciated

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2. You need to expand (1+y)^1/2

Then substitute (x+x^2) for y
3. (Original post by Aneesa.x)
(1+x+x^2) ^1/2

The question says expand as a series so I assumed it means using the binomial expansion for fractional powers, I'v attempted it, but I know its wrong, and I may sound stupid, but I'v never used binomial when there is three terms in the bracket! Lol any help will be appriciated

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Expand
4. You just take (x+x^2) as 1 term.

So you get [1+(x+x^2)]^1/2
5. (Original post by TenOfThem)
You need to expand (1+y)^1/2

Then substitute (x+x^2) for y
That's what I done, I get the wrong answer :/

Could you show me some steps? Maybe I'v gone wrong in my working somewhere..

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6. (Original post by Aneesa.x)
That's what I done, I get the wrong answer :/

Could you show me some steps? Maybe I'v gone wrong in my working somewhere..

This was posted from The Student Room's iPhone/iPad App
7. (Original post by Aneesa.x)
That's what I done, I get the wrong answer :/

Could you show me some steps? Maybe I'v gone wrong in my working somewhere..
Post your working.
8. Oh wait I got it now lol .. silly mistake -___-

Thanks everyonee

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9. I don't understand this at all, is it C2 level stuff?

Because in C2 you never do binomial to the power of a 1/2.

Can someone show me how you do a binomial expansion to the power of a 1/2 please?
10. (Original post by violetheart)
I don't understand this at all, is it C2 level stuff?

Because in C2 you never do stuff to the power of a 1/2.

Can someone show me how you do a binomial expansion to the power of a 1/2 please?
It is C3
11. (Original post by violetheart)
I don't understand this at all, is it C2 level stuff?

Because in C2 you never do binomial to the power of a 1/2.

Can someone show me how you do a binomial expansion to the power of a 1/2 please?
(Original post by TenOfThem)
It is C3
In edexcel it is C4.
12. (Original post by violetheart)
I don't understand this at all, is it C2 level stuff?

Because in C2 you never do stuff to the power of a 1/2.

Can someone show me how you do a binomial expansion to the power of a 1/2 please?
There is a different formula for binomial expansions with fraction or negative powers, don't worry about it yet if you're doing C2

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13. (Original post by raheem94)
In edexcel it is C4.
Maybe C4 then
14. Ahh, thankyou, I was pretty worried then I'm just starting C3 but I was wondering if I missed something important.

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