If a+b+c = 10 and a2+b2+c2=38; find ab+bc+ca – InterviewSolution

1.	If a+b+c = 10 and a2+b2+c2=38; find ab+bc+ca
Answer» If a+b+c = 10 and $a^{2} + b^{2} + c^{2} = 38; f i n d a b + b c + c a$

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