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    hi Ive got a question on identity

    which one is an identity
    1. (x-3)2
    2. (x-3)2>5
    3. (x-3)2=1-6x
    4. (x-3)21-6x+9

    the 2's after the brackets is squared

    Please help need it for my exam tomorow
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    https://en.wikipedia.org/wiki/Identity_(mathematics) - just the first line is enough!

    An identity needs an = sign, you've only got one of those.

    Good luck with your exam

    Edited -this is a better link, more straightforward https://www.bbc.co.uk/education/guides/zc7xfcw/revision
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    (Original post by Moshah7)
    hi Ive got a question on identity

    which one is an identity
    1. (x-3)2
    2. (x-3)2>5
    3. (x-3)2=1-6x
    4. (x-3)21-6x+9

    the 2's after the brackets is squared

    Please help need it for my exam tomorow
    None of them is an identity.
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    (Original post by Moshah7)
    hi Ive got a question on identity

    which one is an identity
    1. (x-3)2
    2. (x-3)2>5
    3. (x-3)2=1-6x
    4. (x-3)21-6x+9

    the 2's after the brackets is squared

    Please help need it for my exam tomorow
    None of them is an identity. Although, I think you may have meant for number 4 that (x-3)^2= x^2-6x+9 in which case it is an identity. An identity is something which is always true for all values of x and contains an equals sign,often denoted by ≡ though rather than = but if you did that here it would give away what was an identity.
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    (Original post by RDKGames)
    None of them is an identity.
    You're right.

    OP can you check you've typed them correctly? What's the last one meant to be?
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    None lol
    Posted on the TSR App. Download from Apple or Google Play
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    yep sorry it was a typo soz
 
 
 
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