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Binomial expansion

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    got a question that's bugging me x100

    it's 2b)

    i'd appreciate any help
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    Expand both the brackets
    collect like terms
    factorise
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    Expand the (1+x)^4 then think what differences (1-x)^4 would have
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    (Original post by nitrogenousBase)
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    got a question that's bugging me x100

    it's 2b)

    i'd appreciate any help
    You can save yourself a lot of work by using 2a.

    So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
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    (Original post by SeanFM)
    You can save yourself a lot of work by using 2a.

    So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
    Is it not essentially the same expansion except with certain terms of negative value?
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    (Original post by nitrogenousBase)

    got a question that's bugging me x100

    it's 2b)

    i'd appreciate any help
    (Original post by SeanFM)
    You can save yourself a lot of work by using 2a.

    So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
    Difference of two squares cleans it up pretty quickly.
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    (Original post by nitrogenousBase)
    Is it not essentially the same expansion except with certain terms of negative value?
    Indeed!

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