Multiple Choice Questions on x3 ndash 4x2 3x 0 7y3 ndash 23y2 6y 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

x3 ndash 4x2 3x 0 7y3 ndash 23y2 6y 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    x3 – 4x2 + 3x = 0

    7y3 – 23y2 + 6y = 0

    x

    Incorrect Answer

    x<=y

    Incorrect Answer

    x>y

    Incorrect Answer

    x>=y

    Correct Answer
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    Explanation:

    x3 – 4x2 + 3x = 0
    This gives x(x2 – 4x + 3) = 0
    ⇒ x(x – 3)(x – 1) = 0
    ⇒ x = 0, 1 or 3
    7y3 – 23y2 + 6y = 0
    ⇒y(7y2 – 23y + 6) = 0
    ⇒y(7y – 2)(y – 3) = 0
    ⇒ y = 0, 2/7 or 3
    x>=y

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