The perpendicular from A on side BC of ...

The perpendicular from A on side BC of a `DeltaABC` intersects BC at D such the DB = 3 CD . Prove that 2 `AB^(2)=2AC^(2)+BC^(2)`

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The correct Answer is:

`2 AB^(2) = 2 AC^(2) + BC^(2)`

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