Решите системы уравнений: 1)4(x+y)^2-7(x+y)=15 5x-2y=1 2) xy=2 9x^2+y^2=13 - №25916415

Решите системы уравнений:
1)4(x+y)^2-7(x+y)=15
5x-2y=1
2) xy=2
9x^2+y^2=13
- Предмет:
  Математика
- Автор:
  arcadio
- 5 лет назад

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