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    Question

    For what value of m, the equation (3m +

    1) x 2 + 2 (m+1) x + m = 0 have equal roots. For equal roots D=0.
    A 1 , -1/2 Correct Answer Incorrect Answer
    B 2 or 4 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 3 Correct Answer Incorrect Answer

    Solution

    For equal roots b²- 4ac = 0 => {2(m+1)}² - 4 (3m +1)*m = 0 => -8m² + 4m + 4 = 0 => (m - 1)(-8m - 4) = 0 => m = 1, -1/2 ` `

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