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    Question

    The square of the sum of two numbers equals the square

    of the difference between them. Which of the following has to be true?
    A Both have to be necessarily zero Correct Answer Incorrect Answer
    B At least one of them has to be necessarily zero Correct Answer Incorrect Answer
    C One number has to be the negative of the other Correct Answer Incorrect Answer
    D One number has to be the inverse of the other Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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