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17 May, 19:51

1. Solve x2 - 81 = 0.

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Answers (1)
  1. 17 May, 20:20
    0
    x = - 9, 9.

    Step-by-step explanation:

    x^2 - 81 = 0

    x^2 = 81

    x = - 9, 9.
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