Multiple Choice Questions on I 18x sup2 ndash 63x 40 0 II 12y sup2 47y 45 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

I 18x sup2 ndash 63x 40 0 II 12y sup2 47y 45 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    I) 18x² – 63x + 40 = 0

    II) 12y² + 47y + 45 = 0

    x < y

    Incorrect Answer

    x<=y

    Incorrect Answer

    x>y

    Correct Answer

    x>=y

    Incorrect Answer
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    Explanation:

    I) 18x² – 63x + 40 = 0
    18x²-15x-48x+40=0
    3x(6x-5)-8(6x-5)=0
    (3x-8)(6x-5)=0
    x=8/3,5/6
    II) 12y²+47y+45=0
    12y²+27y+20y+45=0
    3y(4y+9)+5(4y+9)=0
    (3y+5)(4y+9)=0
    Y =-5/3,-9/4
    Hence, x > y

    By: Amit Kumar
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