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Консультация № 193459
07.08.2018, 16:28
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Прикрепленные файлы:
Обсуждение
08.08.2018, 17:01
общий
это ответ
Здравствуйте, lk!
Первое можно еще так. Первое уравнение системы рассматривается как квадратное относительно икса
Первое можно еще так. Первое уравнение системы рассматривается как квадратное относительно икса
Прикрепленные файлы:
08.08.2018, 21:43
общий
Адресаты:
а что делать для второй системы, начиная с момента xy=-100/13?. получаются довольно корявые числа
09.08.2018, 06:43
общий
это ответ
Здравствуйте, lk!
Решение для первого задания.
Первое уравнение системы представим в виде
(x + 2y + 2)*(x - y + 6) = 0.
Есть две возможности: 1) x + 2y + 2 = 0, 2) x - y + 6 = 0.
1) Из второго уравнения подстановкой x = -2y - 2 найдем
3y^2 + 8y - 3 = 0.
Решения: y= -3 и y = 1/3. Cоответственно, x = 4 и x = -8/3.
2) Подстановка x = y - 6 во второе уравнение дает:
-12y + 29 = 0, решение y = 29/12, x = - 43/12.
Решение для первого задания.
Первое уравнение системы представим в виде
(x + 2y + 2)*(x - y + 6) = 0.
Есть две возможности: 1) x + 2y + 2 = 0, 2) x - y + 6 = 0.
1) Из второго уравнения подстановкой x = -2y - 2 найдем
3y^2 + 8y - 3 = 0.
Решения: y= -3 и y = 1/3. Cоответственно, x = 4 и x = -8/3.
2) Подстановка x = y - 6 во второе уравнение дает:
-12y + 29 = 0, решение y = 29/12, x = - 43/12.
Форма ответа
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