Multiple Choice Questions on I 40x2 59x 21 0 II 14y2 45y 14 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

I 40x2 59x 21 0 II 14y2 45y 14 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    I. 40x2-59x+21=0

    II. 14y2+45y-14=0

    x > y

    Correct Answer

    x ≥ y

    Incorrect Answer

    x < y

    Incorrect Answer

    x = y or Cannot be determined.

    Incorrect Answer
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    Explanation:

    40x2-59x+21=0
    40x2 -24x-35x+21=0
    8x(5x -3) -7(5x -3)=0
    (5x-3) ( 8x-7)=0
    x= 3/5 , 7/8
    14y2+45y-14=0
    14y2 +49y- 4y -14=0
    7y( 2y+7) – 2(2y+7)=0
    (2y+7) ( 7y-2)=0
    y= -7/2, 2/7
    Hence x>y

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