Multiple Choice Questions on I x3 ndash 9x2 20x 0 II y3 ndash 14y2 48y 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

I x3 ndash 9x2 20x 0 II y3 ndash 14y2 48y 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    I. x3 – 9x2 + 20x = 0

    II. y3 –14y2 + 48y = 0

    x>y

    Incorrect Answer

    x<y

    Incorrect Answer

    x≤y

    Incorrect Answer

    x= y or no relation

    Correct Answer
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    Explanation:

    I. x3 – 9x2 + 20x = 0
    x(x2 – 9x + 20) = 0
    x2 – 9x + 20 = 0
    x2 – 4x–5x + 20 = 0
    x = 4, 5 and 0
    II. y3 –14y2 + 48y = 0
    y(y2 –14y + 48) = 0
    y2 –14y + 48 = 0
    y2 –6y –8y+ 48 = 0
    y = 6, 8 and 0
    Hence, no relation

    By: MIRZA SADDAM HUSSAIN
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