x(x + 3)(x - 1) = x²(x + 2),
x(x² - x + 3x - 3) = x³ + 2x²,
х(х² + 2х - 3) - х³ - 2х² = 0,
x³ + 2x² - 3x - x³ - 2x² = 0,
-3x = 0,
x = 0.
ответ: 0.
x(x + 3)(x - 1) = x²(x + 2),
x(x² - x + 3x - 3) = x³ + 2x²,
х(х² + 2х - 3) - х³ - 2х² = 0,
x³ + 2x² - 3x - x³ - 2x² = 0,
-3x = 0,
x = 0.
ответ: 0.