If vec(a)_(1) and vec(a)_(2) are two non collinear unit vectors and if |vec(a)_(1) + vec(a)_(2)| = sqrt3 then the value of (vec(a)_(1) - vec(a)_(2)).(2vec(a)_(1) + vec(a)_(2)) is:

If vec(a)_(1) and vec(a)_(2) are two non collinear unit vectors and if

1.	If vec(a)_(1) and vec(a)_(2) are two non collinear unit vectors and if \|vec(a)_(1) + vec(a)_(2)\| = sqrt3 then the value of (vec(a)_(1) - vec(a)_(2)).(2vec(a)_(1) + vec(a)_(2)) is:
Answer» 2 `3//2` 1//2` 1 Answer :C