25x² - 10x + 8 = (5x - 1)² + 9
25x² - 10x + 8 = 25x² - 10x + 1 + 9
25x² - 10x - 25x² + 10x = 10 - 8
0 * x = 2
Ответ :корней нет , x ∈ ∅
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25x² - 10x + 8 = (5x - 1)² + 9
25x² - 10x + 8 = 25x² - 10x + 1 + 9
25x² - 10x - 25x² + 10x = 10 - 8
0 * x = 2
Ответ :корней нет , x ∈ ∅