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# Identity Maths watch

1. 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

2. 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.

Edited -this is a better link, more straightforward https://www.bbc.co.uk/education/guides/zc7xfcw/revision
3. (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

None of them is an identity.
4. (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

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.
5. (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?
6. None lol
7. yep sorry it was a typo soz

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