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Railways R.R.C. (Gorakhpur) Solved Paper Held on 1st Shift 9-11-2014

  • question_answer
    What is the sum of the values of x in the following equation? \[{{x}^{2}}+x-30=0\]

    A) \[-1\]                

    B) 1

    C) 29                                

    D) 0

    Correct Answer: A

    Solution :

    \[{{x}^{2}}+x-30=0\] \[{{x}^{2}}+6x-5x-30=0\] \[(x+6)\,\,(x-5)=0\] \[x=5,\,\,-6\] Now, required sum \[=5-6\] \[=-1\]


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