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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-7

  • question_answer
    If\[-\,2\], is a root of\[2{{x}^{2}}-x+k=0\], what is the value of k?   

    A)  6                                

    B)   \[-\,6\]

    C)  10                               

    D)  \[-\,10\]

    Correct Answer: D

    Solution :

     One root of the equation \[2{{x}^{2}}-x+k=0\,\,is-2.\] \[\therefore \] \[2{{(-2)}^{2}}-(-2)+k=0\]             \[\Rightarrow \] \[8+2+k=0\]             \[\Rightarrow \]\[k=-10\]


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