Multiple Choice Questions on x2 x 56 y2 ndash 17y 72 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

x2 x 56 y2 ndash 17y 72 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    x2 + x = 56

    y2 – 17y + 72 = 0

    x

    Correct Answer

    x<=y

    Incorrect Answer

    x>y

    Incorrect Answer

    x>=y

    Incorrect Answer
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    Explanation:

    x2 + x = 56
    x2 + 8x – 7x -56 = 0
    x(x+8) -7 (x+8) =0
    (x+8) (x-7) =0
    x= -8 , 7
    y2 – 17y + 72 = 0
    y2 – 9y – 8y + 72 =0
    y(y-9) -8(y-9) = 0
    (y-9) (y-8) =0
    y= 9, 8
    x < y

    By: Amit Kumar
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