решите уровнения (-х+5)*(х+4)=0 - №18997983

решите уровнения (-х+5)*(х+4)=0
- Предмет:
  Математика
- Автор:
  demarion
- 5 лет назад

Ответы 1

(-х+5)*(х+4)=0-x²-4x+5x+20=0-x²-x+20=0 |·(-1)x²+x-20=0D=1+4·20=81x1=-1-9\2=-10\2=5x2=-1+9\2=8\2=4 ответ:x1=5;x2=4
- Автор:
  vicente87
- 5 лет назад
- 0
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