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a^(2)+b^(2)+2(ab+bc+ca)...

a^(2)+b^(2)+2(ab+bc+ca)

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Factorize the following equation " "b^(2)+c^(2)+2(ab+bc+ca)

If a^(2) +b^(2) +c^(2) = ab + bc + ca then (a+b)/(c ) + (b+c)/(a) + (c+a)/(b) =?

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In triangle ABC, range of (a^(2)+b^(2)+c^(2))/(ab+bc+ca) is (a,b,c are sides of triangle)