а²+5а-14/а²+14а+49 сократить - №18581547

а²+5а-14/а²+14а+49 сократить
- Предмет:
  Математика
- Автор:
  brettbyrd
- 6 лет назад

Ответы 1

а²+5а-14/а²+14а+49Разложим числитель и знаменатель на множителиа²+5а-14=0Д=25+56=81х1=(-5+9)/2х1=2 х2=(-5-9)/2=-7 а²+5а-14=(х-2)(х+7)а²+14а+49=(а+7)² по формуле квадратов. Тогда получим(а²+5а-14)/(а²+14а+49)=(х-2)(х+7)/(а+7)²=(х-2)/(а+7)
- Автор:
  figarocortez
- 6 лет назад
- 0
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