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    Question

    Determine the value (6.375)2 -

    (3.125)2 
    A 22.465 Correct Answer Incorrect Answer
    B 28.775 Correct Answer Incorrect Answer
    C 30.875 Correct Answer Incorrect Answer
    D 45.875 Correct Answer Incorrect Answer

    Solution

    ATQ,

    We know that (x2 – y2 ) = (x + y) × (x – y) So, (9.375)2 – (3.125)2 = (6.375 + 3.125) × (6.375 – 3.125) = (9.5) × (3.25) = 30.875

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