a + b + c = 13 , a ^ { 2 } + b ^ { 2 } + c ^ { 2 } = 69 . \text { Then – InterviewSolution

1.	a + b + c = 13 , a ^ { 2 } + b ^ { 2 } + c ^ { 2 } = 69 . \text { Then the value of ab } + \text { be } +
Answer» it is 69 not 169

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