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22 December, 01:34

Solve: 16x2 - 81 = 0.

x = 4, 9

x = - 4, - 9

x = 9 over 4, x = - 9 over 4

x = 81 over 16, x = - 81 over 16

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Answers (1)
  1. 22 December, 02:33
    0
    If you would like to solve 16x^2 - 81 = 0, you can calculate this using the following steps:

    16x^2 - 81 = 0

    (4x - 9) * (4x + 9) = 0

    1. 4x - 9 = 0 ... 4x = 9 ... x = 9/4

    2. 4x + 9 = 0 ... 4x = - 9 ... x = - 9/4

    The correct result would be: x = 9 over 4, x = - 9 over 4.
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