Ответы 1
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1. Возводим в квадрат, получаем квадратное уравнение
находим корни 3 и -4
подставляем в исходное уравнение для проверки и убеждаемся. что оба подходят.
Ответ 3 и -4.
2.
Легко угадать два корня 0 и 4, а после возведения 2 раза в квадрат уравнение станет квадратным и большего числа корней не имеет.
Ответ 0 и 4.
3. ОДЗ этого уравнения
При этом если
то правая часть отрицательна и уравнение корней не имеет.
Осталось проверить число 5. Подставили в исходное уравнение и убедились, что оно корень.
Ответ 5.
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Автор:
cameronjkbt - 6 лет назад
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