New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    I. 63x² + 146x + 80 = 0 II. 42y² + 109y

    + 70 = 0
    A If x Correct Answer Incorrect Answer
    B If x>y, Correct Answer Incorrect Answer
    C If x≥y, Correct Answer Incorrect Answer
    D If x=y or no relationship cannot be established between x and y Correct Answer Incorrect Answer
    E If x≤y Correct Answer Incorrect Answer

    Solution

    I. 63x² + 146x + 80 = 0 63x² + 90x + 56x + 80 = 0 9x(7x + 10) + 8(7x + 10) = 0 (9x + 8) (7x + 10) = 0 ∴ x = (-8)/9, (-10)/7 II. 42y² + 109y + 70 = 0 42y² + 60y + 49y + 70 = 0 6y(7y + 10) + 7(7y + 10) = 0 (6y + 7) (7y + 10) = 0 ∴ y = (-7)/6, (-10)/7 Hence, relationship cannot be established between x and y

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