Multiple Choice Questions on If x y 5 7 then find the value of 5x2 17xy 9y2 y2 ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

If x y 5 7 then find the value of 5x2 17xy 9y2 y2 ........

Quantitative Aptitude (RRB NTPC) Algebra
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    If x/y= 5/7 then find the value of (5x2 -17xy+9y2)/y2

    -39/49

    Incorrect Answer

    29/58

    Incorrect Answer

    -29/49

    Correct Answer

    23/49

    Incorrect Answer
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    Explanation:

    Given x/y= 5/7
    Now, (5x2 -17xy+9y2)/y2
    = 5 (x/y)2-17(x/y)+9
    =5 (5/7)2-17(5/7) + 9
    =-29/49

    By: MIRZA SADDAM HUSSAIN
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