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

  • question_answer
    If the sum of a number and its square is 182, then what is the number?

    A) 15                      

    B)         26

    C) 28                       

    D)        13

    E)  None of these

    Correct Answer: D

    Solution :

    Explanation Option [d] is correct. Let the number be x. Then, \[x+{{x}^{2}}=182\Rightarrow {{x}^{2}}+x-182=0\] \[\Rightarrow (x+14)(x-13)=0\Rightarrow x=13.\]


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