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9 November, 05:46

If - 1 is one of the roots of the equation 3x² - 2k - 2x - 1 = 0, find the value of k.

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Answers (2)
  1. 9 November, 07:07
    0
    The value in k is k=12
  2. 9 November, 09:29
    0
    k = 2

    Step-by-step explanation:

    Given that x = - 1 is a root of the equation, then it satisfies the equation.

    Substitute x = - 1 into the equation and solve for k, that is

    3 ( - 1) ² - 2k - 2 ( - 1) - 1 = 0

    3 - 2k + 2 - 1 = 0

    - 2k + 4 = 0 (subtract 4 from both sides)

    - 2k = - 4 (divide both sides by - 2)

    k = 2
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