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

    Question

    I. 96x² + 52x - 63 = 0 II. 77y² + 155y + 72 =

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

    Solution

    I.  96x² + 52x - 63 = 0 96x² + 108x - 56x - 63 = 0 12x (8x + 9) - 7(8x + 9) = 0 (12x - 7) (8x + 9) = 0 x =  7/12 , - 9/8 II. 77y² + 155y + 72 = 0 77y² + 56y + 99y + 72 = 0 7y(11y + 8) + 9(11y + 8) (7y + 9)    (11y + 8)= 0 y = -  9/7 , - 8/11 Hence no relationship can be established.

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