CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2010

  • question_answer
    The value of a for which the equation\[2{{x}^{2}}+2\sqrt{6}x+a=0\]has equal roots, is

    A)  3                                            

    B)  \[4\]

    C)  2                            

    D)         \[\sqrt{3}\]

    E)  \[\sqrt{2}\]

    Correct Answer: A

    Solution :

    Equation\[2{{x}^{2}}+2\sqrt{6}x+a=0\]has equal roots, if \[{{b}^{2}}-4ac=0\] \[\Rightarrow \]               \[24-4\times 2\times a=0\] \[\Rightarrow \]               \[a=3\]


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