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АннаМесси
@АннаМесси
August 2021
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nKrynka
Решение
x³ - 7x - 6 = 0
x₁ = - 1
x³ - 7x - 6 Ix + 1
-(x³ + x²) x² - x - 6
-- x² - 7x
-(-x² - x)
- 6x - 6
-(-6x - 6)
0
x² - x - 6 = 0
x₂ = - 2
x₃ = 3
x³ - 7x - 6 = (x + 1)*(
x² - x - 6
) = (x + 1)*(x - 3)*(x + 2)
Ответ: x₁ = - 1; x₂ = - 2; x₃ = 3
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Answers & Comments
x³ - 7x - 6 = 0
x₁ = - 1
x³ - 7x - 6 Ix + 1
-(x³ + x²) x² - x - 6
-- x² - 7x
-(-x² - x)
- 6x - 6
-(-6x - 6)
0
x² - x - 6 = 0
x₂ = - 2
x₃ = 3
x³ - 7x - 6 = (x + 1)*(x² - x - 6) = (x + 1)*(x - 3)*(x + 2)
Ответ: x₁ = - 1; x₂ = - 2; x₃ = 3