Question

Решите уравнение:
2х^3 - 32x = 0
81x^3 + 18x^2 +x=0
x^3 + 6x^2 - x - 6=0

Answer 1

1)

2x³ - 32x = 0

2x(x² - 16) = 0

x = 0

x = 4

x = -4

OTBET: -4; 0; 4

2) 

81x³ + 18x² + x = 0

81x(x² + 2x/9 + 1/81) = 0

81x(x+1/9)² = 0

x = 0

x = -1/9

OTBET: -1/9; 0

3)

x³ + 6x² - x - 6 = 0

x²(x + 6) - (x+6) = 0

(x² - 1)(x + 6) = 0

x = 1

x = -1

x = -6

OTBET: -6; -1; 1

Детальніше - на Znanija.com - https://znanija.com/task/23526153#readmore