Multiple Choice Questions on I 3x2 2x ndash 21 0 II 6y2 ndash 5y ndash 21 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

I 3x2 2x ndash 21 0 II 6y2 ndash 5y ndash 21 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    I. 3x2 + 2x – 21 = 0

    II. 6y2 – 5y – 21 = 0

    x < y

    Incorrect Answer

    x ≥ y

    Incorrect Answer

    x ≤ y

    Incorrect Answer

    x = y or relation cannot be established

    Correct Answer
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    Explanation:

    3x2 + 2x – 21 = 0
    3x2 + 9x – 7x – 21 = 0
    Gives x = -3, 7/3
    6y2 – 5y – 21 = 0
    6y2 + 9y – 14y – 21 = 0
    Gives y = -3/2, 7/3
    Put all values on number line and analyze the relationship
    -3….. -3/2….. 7/3

    By: Amit Kumar
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