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7th Class Mathematics Integers Question Bank Number System

  • question_answer
    The multiplication \[(3+\sqrt{2})(3-\sqrt{2})\] results in a

    A)  rational number 

    B)  irrational number

    C)  neither rational nor irrational       

    D)  imaginary number

    Correct Answer: A

    Solution :

    (a): \[(3+\sqrt{2})(3-\sqrt{2})\] \[=9-2=7=\]rational number.


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