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prove that [ [a-b-c , 2a , 2a ] , [2b , ...

prove that `[ [a-b-c , 2a , 2a ] , [2b , b-c-a , 2b ] ,[2c ,2c,c-a-b]]`= `(a+b+c)^3`

A

`-(a+b+c)`

B

`2(a+b+c)`

C

abc

D

`-2(a+b+c)`

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The correct Answer is:
D
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