5a³ - 20a = 0
5a(a² - 4) = 0
a(a² - 4) = 0
a₁ = 0
a² - 4 = 0
a² = 4
a = ± √4
a₂ = 2
a₃ = -2
ответ: 2; -2
49y³ - 14y² + y = 0
y(49y² - 14y + 1) = 0
y(7y - 1)² = 0
y₁ = 0
(7y - 1)² = 0
7y - 1 = 0
7y = 1
y₂ = 1/7
ответ: 0; 1/7
n³ + 5n² - 7n - 35 = 0
n²(n + 5) - 7(n + 5) = 0
(n + 5)(n² - 7) = 0
n + 5 = 0
n₁ = -5
n² - 7 = 0
n² = 7
n = ± √7
n₂ = √7
n₃ = -√7
ответ: √7; -√7
5a³ - 20a = 0
5a(a² - 4) = 0
a(a² - 4) = 0
a₁ = 0
a² - 4 = 0
a² = 4
a = ± √4
a₂ = 2
a₃ = -2
ответ: 2; -2
2)49y³ - 14y² + y = 0
y(49y² - 14y + 1) = 0
y(7y - 1)² = 0
y₁ = 0
(7y - 1)² = 0
7y - 1 = 0
7y = 1
y₂ = 1/7
ответ: 0; 1/7
3)n³ + 5n² - 7n - 35 = 0
n²(n + 5) - 7(n + 5) = 0
(n + 5)(n² - 7) = 0
n + 5 = 0
n₁ = -5
n² - 7 = 0
n² = 7
n = ± √7
n₂ = √7
n₃ = -√7
ответ: √7; -√7