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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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