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    3. Quantitative Aptitude
    4. Algebra
    5. If 4x² + y² = 25 and x y = 6, then find the value  of 2x + y?

    Question

    If 4x² + y² = 25 and x y = 6, then find the value  of

    2x + y?
    A 7 Correct Answer Incorrect Answer
    B 14 Correct Answer Incorrect Answer
    C 12 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    Given -4x² + y² = 25 and x y = 6 so now (2x+y) ² =4x² +y²+4xy = 25+4×6=49 (2x+y) =7

    Practice Next
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    Relevant for Exams:

    • RRB NTPC

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