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13 March, 11:17

4x^2=81 how do I figure this out

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Answers (1)
  1. 13 March, 12:54
    0
    x = ± 9/2

    Step-by-step explanation:

    isolate the

    x

    2

    term, by dividing by 4

    hence

    x

    2

    = 81/4⇒

    x

    =

    ±



    81

    4

    =

    ±

    9

    2
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