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

    Question

    In the following questions, two equations numbered I and II are given. You have to solve both the equations and give answer.

    I. 7x² + 52x + 21 = 0 II. 6y² + 7y - 24

    = 0
    A if x>y Correct Answer Incorrect Answer
    B if x≥y Correct Answer Incorrect Answer
    C if x Correct Answer Incorrect Answer
    D if x ≤y Correct Answer Incorrect Answer
    E if x=y or the relationship cannot be established Correct Answer Incorrect Answer

    Solution

    I. 7x² + 52x + 21 = 0 7x² + 3x + 49x + 21 = 0 x (7 x + 3) + 7(7x + 3) = 0 (x + 7)(7 x + 3) = 0 ∴ x = -7, -3/7 II. 6y² + 7y - 24 = 0 6y² + 16y - 9 y - 24 = 0 2 y (3 y + 8) - 3(3 y + 8) = 0 (2 y - 3) (3 y + 8) = 0 ∴ y = 3/2 , -8/3 Hence, relation cannot be established between x and y

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