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If a+b+c=2s , then the value of (s-a)...

If `a+b+c=2s` , then the value of `(s-a)^2+(s-b)^2+(s-c)^2+s^2` will be `s^2-a^2-b^2-c^2` (b) `s^2+a^2+b^2+c^2` (c) `a^2+b^2+c^2` (d) `4s^2-a^2-b^2-c^2`

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