Multiple Choice Questions on i x sup2 ndash 21x 108 0 ii y sup2 ndash 17y 72 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

i x sup2 ndash 21x 108 0 ii y sup2 ndash 17y 72 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    (i) x² – 21x + 108 = 0

    (ii) y² – 17y + 72 = 0

    y > x

    Incorrect Answer

    y > x

    Incorrect Answer

    x >= y

    Correct Answer

    No relation exists

    Incorrect Answer
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    Explanation:

    (i)x² – 21x + 108 = 0
    x² – 9x – 12x + 108 = 0
    x(x – 9) – 12 (x – 9) = 0
    x = 9, 12
    (ii) y² – 17y + 72 = 0
    y² – 8y – 9y + 72 = 0
    y (y – 8) – 9 (y – 8) = 0
    y = 8,9
    x ≥ y

    By: Amit Kumar
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