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BL and CM are medians of DeltaABC, right...

BL and CM are medians of `DeltaABC`, right - angled a A.
Prove that `4("BL"^(2)+"CM"^(2))=5" BC"^(2)`

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The correct Answer is:
`4("BL"^(2)+"CM"^(2))=5" BC"^(2)`
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