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a² - 4a - 12 < 0
(a-6)(a+2) < 0
a < 6 atau x > -2
|x-2|< 6 atau |x-2|> -2
-6 < x - 2 < 6 atau 2 > x - 2 > - 2
-6 + 2 < x < 6+2 atau 2 + 2 > x > -2 + 2
-4 < x < 8 atau 4 >x > 0
HP 0 < x < 4