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The value of |vec(a)+vec(b)|^(2)+|vec(a)...

The value of `|vec(a)+vec(b)|^(2)+|vec(a)-vec(b)|^(2)` is

A

`2(absvec(a)^(2)+absvec(b)^(2))`

B

`4vec(a).vec(b)`

C

`2(absvec(a)^(2)-absvec(b)^(2))`

D

`4absvec(a)^(2)-absvec(b)^(2)`

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