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The value of x which satisfies the equat...

The value of x which satisfies the equation `(x+a^(2)+2c^(2))/(b+c)+(x+b^(2)+2a^(2))/(c+a)+(x+c^2+2b^(2))/(a+b)=0` is

A

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

B

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

C

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

D

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

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