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14 June, 15:42

If 3^2*-1=81, what is the value of x?

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Answers (2)
  1. 14 June, 18:40
    0
    It wrong, 3^2 = 9

    9 x - 1 = - 81.

    it always negative put on it.
  2. 14 June, 19:00
    0
    Hello:

    3^ (2*-1) = 81

    3^ (2*-1) = 3^4

    2x-1 = 4

    2x=5

    x=5/2
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