Multiple Choice Questions on find the roots of the quadratic equation x 2 2x 15 0 ........ for CDS Exam Preparation

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Multiple Choice Questions

find the roots of the quadratic equation x 2 2x 15 0 ........

Quantitative Aptitude (CDS) Quadratic Equations
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    find the roots of the quadratic equation:

    x^2+2x-15=0 ?

     

    -5,3
     

    Incorrect Answer

    3,-5
     

    Correct Answer

    -3,5
     

    Incorrect Answer

    -3,-5

    Incorrect Answer
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    Explanation:

    x^2+5x-3x-15=0
    x(x+5)-3(x+5)=0
    (x-3)(x+5)=0
    x=3 or x=-5

    By: bhavesh kumar singh
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