Помогите решить корень из 3x-1=корень из x2+x-4

Помогите решить корень из 3x-1=корень из x2+x-4
- Предмет:
  Алгебра
- Автор:
  esteban
- 6 лет назад

Ответы 1

√(3х-1)=√(х^2+х-4)возводим в ^2 (квадрат) обе стороны3х-1=х^2+х-4х^2-2х-3=0D= (-2)^2-4*1*(-3)=16x1=(-b+√D)/2a=(2+4)/2=3x2=(-b-√D)/2a=(2-4)/2=-1Ответ: x=3, т.к если подставить х2 то получится отрицательное число, а под корнем не может быть отрицательное число.
- Автор:
  díazhxpg
- 6 лет назад
- 0
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Помогите решить корень из 3x-1=корень из x2+x-4

Ответы 1

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