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3 June, 10:38

N squared minus 1 equals 8

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Answers (1)
  1. 3 June, 11:07
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    n = - 3 or n = 3

    Step-by-step explanation:

    n² - 1 = 8

    n² - 9 = 0

    (n + 3) (n - 3) = 0

    n + 3 = 0 or n - 3 = 0
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