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16 January, 07:54

10) x²=16

A ±4

B ±8

C 4

D 8

+5
Answers (1)
  1. 16 January, 08:01
    0
    x² = 16

    x² - 16 = 0

    x² - 4² = 0

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

    x = 4 or x = - 4

    x = ±4 (A)
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