Ответ во вложении....
-х² + 6х - 5 = 0,
х² - 6х + 5 = 0,
Д = (-6)² - 4*1*5 = 36 - 20 = 16,
х1 = (6 + 4) / 2*1 = 10/2 = 5,
х2 = (6 - 4) / 2*1 = 2/2 = 1
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Ответ во вложении....
-х² + 6х - 5 = 0,
х² - 6х + 5 = 0,
Д = (-6)² - 4*1*5 = 36 - 20 = 16,
х1 = (6 + 4) / 2*1 = 10/2 = 5,
х2 = (6 - 4) / 2*1 = 2/2 = 1