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Discussion :: Quadratic Equations

  1. Find the roots of the quadratic equation: 2x2 + 3x - 9 = 0?
  2. A.
    3, -3/2
    B.
    3/2, -3
    C.
    -3/2, -3
    D.
    3/2, 3
    E.
    2/3, -3

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    Answer : Option B

    Explanation :

    2x2 + 6x - 3x - 9 = 0
    2x(x + 3) - 3(x + 3) = 0
    (x + 3)(2x - 3) = 0
    => x = -3 or x = 3/2.


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