1. Английский язык
  2. X ² =5x-4розв язати рівняння

X ² =5x-4
розв'язати рівняння
ів​

LonFostYT LonFostYT    1   24.03.2020 08:48    0

Ответы
АзизОсманов АзизОсманов  12.08.2020 07:59

x1=4

x2=1

Объяснение:

Переносимо усе в ліву частина і отримуємо рівняння:

x ² -5x+4=0

Знаходимо дискримінант за формулою D= b²-4ac

D=25-4*4*1=25-16=9

Обчислюємо х1 і х2 за формулами:

x1=(-b+√D)/2a

x2=(-b-√D)/2a

x1=(5+3)/2=4

x2=(5-3)/2=1

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