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In a DeltaABC, D is the mid-point of BC ...

In a `DeltaABC`, D is the mid-point of BC and E is the foot of the perpendicular drawn from A on BC. If ED=X. AD=p, AE=h, AB=c, AC=b, and BC=a, then `2b^2 +2c^2- a^2 =…………...`

A

`p^2`

B

`2p^2`

C

`4p^2`

D

None of these

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