ଯଦି a + b + c = 10 ; a2 + b2 + c2 = 38 ହୁଏ, ତେବେ (a - b)2 + (b - c)2 + (c - a)ର ମୂଲ୍ୟ କେତେ ହେବ?

1
15 
2
12 
3
14 
4
13 

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