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16 July, 10:43

Is this equal to 0?

6d^2+5d=1

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Answers (2)
  1. 16 July, 10:53
    0
    d = - 1 and 1/6

    6d² + 5d - 1 = 0

    6d² + 6d - 1d - 1 = 0

    6d (d+1) - 1 (d+1) = 0

    (6d - 1) (d+1) = 0

    d+1 = 0

    d = - 1

    and d also is

    6d - 1 = 0

    6d = 1

    d = 1/6
  2. 16 July, 10:53
    0
    6d² + 5d = 1

    6 (-1) ² + 5 (-1) = 1

    (6 * 1) + (-5) = 1

    6 - 5 = 1

    1 = 1

    So d equals - 1
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