Ответы на вопрос:
(x - 2)(4x + 1) < (x + 1)² + 3
4x² + x - 8x - 2 < x² + 2x + 1 + 3
4x² - 7x - 2 - x² - 2x - 4 < 0
3x² - 9x - 6 < 0
x² - 3x - 2 < 0
x² - 3x - 2 = 0
D = (-3)² - 4 * (- 2) = 9 + 8 = 17
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