Ответ:
x^2 - 3x - 4 < 0
D = 9 + 16 =25.
x= (3 + - 5) / 2
x1 = 4 > 0 - не подходит
x2 = -1 < 0
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Ответ:
x^2 - 3x - 4 < 0
D = 9 + 16 =25.
x= (3 + - 5) / 2
x1 = 4 > 0 - не подходит
x2 = -1 < 0