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28 July, 14:04

What are the solutions to the quadratic equation x2 - 16 = 0?

x = 2 and x = - 2

x = 4 and x = - 4

x = 8 and x = - 8

x = 16 and x = - 16

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Answers (2)
  1. 28 July, 14:32
    0
    x = 4 and x = - 4

    Step-by-step explanation: B on edg I got 100%
  2. 28 July, 14:33
    0
    Answer: x = + 4 or x = - 4

    Step-by-step explanation:

    x² - 16 = 0

    using bi formula

    -b ± (√b² - 4ac) / 2a

    where a=1, b=0, c=-16 from the equation above

    - (0) ± (√ (0) ² - 4 x1x-16) / 2x1

    = ± (√64) / 2

    = ± 8/2

    = ± 4

    ∴ x = + 4 or x = - 4

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