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if a + b + c equal to 6 and a square + b square + c square equals to 34 ,then ab+bc+ca= |
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Answer» Given : a+b+c = 6 a² + b² + c² = 34 We know, (a+b+c)² = a² + b² + c² + 2(ab+bc+ac) 6² = 34 + 2(ab+bc+ac) 36 - 34 = 2(ab+bc+ac) 2/2 = (ab+bc+ac) (ab+bc+ac) = 1 |
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