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9 February, 13:18

Solve x²-121=0

Answer choices

0

-11

11

11,-11

+4
Answers (1)
  1. 9 February, 15:10
    0
    Answer is 11,-11

    x²-121=0

    x² - 11²=0

    (x + 11) (x-11) = 0

    x + 11 = 0 then x = - 11

    x - 11 = 0 then x = 11
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