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    Question

    Simplify the given expression.

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    A 1/259 Correct Answer Incorrect Answer
    B 1/185 Correct Answer Incorrect Answer
    C 1/679 Correct Answer Incorrect Answer
    D 1/450 Correct Answer Incorrect Answer

    Solution

    Let a=432 and b=247. (a2+b2-ab)/(a3+b3) =(a2+b2-ab)/ (a2+b2-ab) (a+b) =1/(a+b) =1/ (432+247) =1/679

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