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Given a parallelogram ABCD. If |AB|=a, |...

Given a parallelogram ABCD. If `|AB|=a, |AD|=b, |AC|=c,` then `DB*AB` has the value

A

`(3a^(2) + b^(2)-c^(2))/2`

B

`(a^(2) + 3b^(2) -c^(2))/2`

C

`(a^(2) -b^(2) + 3c^(2))/2`

D

`(a^(2) + 3b^(2) + c^(2))/2`

Text Solution

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The correct Answer is:
B
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