Решите уравнение: x²-x+9=(x+2)² - Дата: 17.12.2019, Автор: elizad8fr - Znanija.Site

Решите уравнение:
x²-x+9=(x+2)²
- Предмет:
  Математика
- Автор:
  elizad8fr
- 5 лет назад

Ответы 1

x²-x+9=(x+2)²x²-x+9=x²+2×2x+2²x²-x+9=x²+4x+4x²-x+9-x²-4x-4=0-5x+5=0-5x=-5x=1
- Автор:
  braedenbush
- 5 лет назад
- 0
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