A quick question about vectors

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    Recently, I saw someone write:
    |OC - OB|^2 = |OC^2 - 2OC*OB + 2OB| where OC and OB are both vectors.
    Can you write this? It is just I am not sure if the two expressions are the same.

    Thank you in advance!
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    (Original post by spacewalker)
    Recently, I saw someone write:
    |OC - OB|^2 = |OC^2 - 2OC*OB + 2OB| where OC and OB are both vectors.
    Can you write this? It is just I am not sure if the two expressions are the same.

    Thank you in advance!
    I have never seen it written like that in normal or further maths and it does not look like it would work, I could be wrong but I am pretty sure it cannot be written like that
 
 
 
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