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

    Question

    Five times a positive integer is 3 less than twice its

    square. Find the integer.
    A 2 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    Let the positive integer be x, then 5x + 3 = 2x2 2x2 5x-3=0 2x²-6x+x-3 = 0 2x (x-3) + 1(x - 3) = 0 (2x + 1) (x - 3) = 0 Taking,   (x - 3) = 0 x = 3 So, the positive integer is 3.

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