Multiple Choice Questions on 40x2 13x 1 0 18y2 77y 18 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

40x2 13x 1 0 18y2 77y 18 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    40x2-13x+1=0

    18y2+77y-18=0

    x > y

    Incorrect Answer

    x ≥ y

    Correct Answer

    x < y

    Incorrect Answer

    x ≤ y

    Incorrect Answer
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    Explanation:

    40x2-13x+1=0
    40x2 -8x-5x+1=0
    8x(5x -1) -1(5x -1)=0
    (5x-1) ( 8x-1)=0
    x= 1/5 , 1/8
    18y2+77y-18=0
    18y2 +81y- 4y -18=0
    9y( 2y+9) – 2(2y+9)=0
    (2y+9) ( 9y-2)=0
    y= -9/2, 2/9
    Hence x ≥ y

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