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    Question

    If the highest common factor (HCF) of x and y is 15,

    then the HCF of 36x² - 81y² and 81x² - 9y² is divisible by_________.
    A 135 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 180 Correct Answer Incorrect Answer
    D 90 Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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