InterviewSolution
` ( a^(2)+B^(2) +C^(2))/( 2DELTA) ` ` ( a^(2)+b^(2) +c^(2))/( 4Delta) ` ` ( a+b +c)/( 3Delta) ` ` ( a^(2)+b^(2) +c^(2))/( 3Delta) `
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