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    Question

    For a =–5 and b = 5, value of a² – b²

    is:
    A –10 Correct Answer Incorrect Answer
    C –50 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    a = -5, b = 5 a² – b² =(a+b)(a-b) =(-5+5)(-10) =0 =0

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