Multiple Choice Questions on I 10x2 136x 14 0 II 25y2 10y 8 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

I 10x2 136x 14 0 II 25y2 10y 8 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    I. 10x2-136x-14=0

    II. 25y2-10y-8=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:

    10x2-136x-14=0
    10x2 -140x+x-14=0
    10x(x -14) + 1(x -14)=0
    (x-14) ( 10x+1)=0
    x= +14 , -1/10
    25y2-10y-8=0
    25y2 -20y+ 10y -8=0
    5y( 5y-4) + 2(5y-4)=0
    (5y-4) ( 5y+2)=0
    y= 5/4, -2/5
    Hence x>y

    By: Amit Kumar
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