помогите решить систему с обьяснением xy=-12 (x-2)(y-4)=-8 два уровнение в одной системе!

помогите решить систему с обьяснением
xy=-12
(x-2)(y-4)=-8
два уровнение в одной системе!
- Предмет:
  Алгебра
- Автор:
  rosario
- 6 лет назад

Ответы 1

$\left \{ {{xy=-12} \atop {(x-2)(y-4)=-8}} ight. \\ \left \{ {{y= -\frac{12}{x} } \atop {(x-2)(- \frac{12}{x}-4)=-8 }} ight. \\ -12-4x+ \frac{24}{x} +8=-8 \\ -4x+4+ \frac{24}{x}=0 \\ -4x^2+4x+24=0 \\ 4x^2-4x-24=0 \\ x^2-x-6=0 \\ D=b^2-4ac=1+24=25=5^2 \\ x_1=3 \\ x_2=-2$
- Автор:
  chain
- 6 лет назад
- 0
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помогите решить систему с обьяснением xy=-12 (x-2)(y-4)=-8 два уровнение в одной системе!

Ответы 1

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помогите решить систему с обьяснением
xy=-12
(x-2)(y-4)=-8
два уровнение в одной системе!