Пожалуйста помогите x²-9x+20=0 - №32168713

Пожалуйста помогите x²-9x+20=0
- Предмет:
  Алгебра
- Автор:
  aileen
- 5 лет назад

Ответы 2

D=(-9)²-4*1*20=81-80=1=1²
x1=(9-1)/(2*1)=8/2=4
x2=(9+1)/(2*1)=10/2=5
Ответ:x=4;x=5
- Автор:
  peppa pigzzd2
- 5 лет назад
- 0
X1+X2=-9X1•X2=-20X1=4X2=5
- Автор:
  bully8ybs
- 5 лет назад
- 0
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