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J & K CET Engineering J and K - CET Engineering Solved Paper-2004

  • question_answer
    If \[x+9\] is a root of \[\left| \begin{matrix}    x & 3 & 7  \\    2 & x & 2  \\    7 & 6 & x  \\ \end{matrix} \right|=0,\]then other  roots are                                

    A)  \[-9,\,2,\,7\]      

    B)  \[9,\,2,\,7\]             

    C)  \[9,\,2,-\,7\]      

    D)  \[9,-\,2,\,7\]

    Correct Answer: A

    Solution :

    Since, \[-9\] is one of the root of the given determinant. From the given options, option [a] is correct.


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