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8th Class Mathematics Squares and Square Roots Question Bank Squares and Square Roots

  • question_answer
    If\[\sqrt{2+\sqrt{x}}=3\], then x =_____.

    A)  1                                

    B)  \[\sqrt{7}\]                 

    C)  7                    

    D)         49                  

    Correct Answer: D

    Solution :

    We have, \[\sqrt{2+\sqrt{x}}=3\] Squaring both sides, we get \[2+\sqrt{x}=9\] or \[\sqrt{x}=9-2=7\] Now, again squaring both sides, we get \[x=49\].


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