9th Class Mathematics Number System and its Operations Question Bank Number Systems

  • question_answer
    If\[x=\frac{2}{3-\sqrt{7}}\], find the value of\[{{(x-3)}^{2}}\].

    A) \[1\]                 

    B)        \[3\]                 

    C) \[6\]                 

    D)        \[7\]                 

    Correct Answer: D

    Solution :

    \[{{(x-3)}^{x}}={{\left[ \frac{2}{3-\sqrt{7}}-3 \right]}^{2}}={{\left[ \frac{2\sqrt{7}}{2} \right]}^{2}}=7\]


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