Multiple Choice Questions on Given that the roots of equation 2x sup2 lambda x 8 0 differ by radic 2 then find lambda ........ for CDS Exam Preparation

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Multiple Choice Questions

Given that the roots of equation 2x sup2 lambda x 8 0 differ by radic 2 then find lambda ........

Quantitative Aptitude (CDS) Quadratic Equations
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    Given that the roots of equation 2x²+λx+8=0 differ by √2 then find λ. 

    ± 4√3 

    Incorrect Answer

    ± 2√3  

    Incorrect Answer

    ± 4√2

    Incorrect Answer

    ± 6√2

    Correct Answer
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    Explanation:

    D.Q.R = |α- β|=√(b^2-4ac)/a 
    Put a = 2 , b = λ , c = 8 nd on solving we get λ =± 6√2

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