как решить -5х[9х-2]+6[х-а]

как решить -5х[9х-2]+6[х-а]
- Предмет:
  Алгебра
- Автор:
  anthonydavis
- 5 лет назад

Ответы 3

а почему в первой строке сразу -40х^2 ?
- Автор:
  lillyubiu
- 5 лет назад
- 0
в первой строке должно быть -45х^2+10х+6х-6а=0
- Автор:
  daphneshort
- 5 лет назад
- 0
-40 $x^{2}$ +10x+6x-6a=0-40 $x^{2}$ +10x+6x-6a=020 $x^{2}$ +8x-6a=0 $\frac{D}{4}$ =4+120aЕсли D<0, то уравнение не имеет решений, то есть, при а< $\frac{-1}{30}$ Если D=0, при a= $\frac{-1}{30}$ уравнение имеет один корень x= $\frac{-2}{5}$ Если D>0, при a> $\frac{-1}{30}$ уравнение имеет два корня $\frac{-8+- \sqrt{D} }{20}$
- Автор:
  gavingowd
- 5 лет назад
- 0
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как решить -5х[9х-2]+6[х-а]

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