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Sai Srivardhan from Maharishi Vidya Mandir Chetpet, Chennai
Subject :IMO    Class : Class 8

If a + b + c = 2s, then
[(s - a)2 + (s - b)2 + (s - c)2 + s2] = ______.

A(s2 - a2 - b2 - c2)
B(s2 + a2 + b2 + c2)
C(a2 + b2 + c2)
D(4s2 - a2 - b2 - c2)


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