Решение
№ 159
1) x³ - 49x = x(x² - 49) = x * (x - 7) * (x + 7)
2) 2y³ - 8y = 2y * (y² - 4) = 2y * (y - 2 * )(y + 2)
3) 0,16y - y³ = y * (0,16 - y²) = y * (0,4 - y) * (0,4 + y)
4) (2/3)*x³ - (8/3)*x = (2/3)*x *(x² - 4) = (2/3) * x * (x - 2) * (x + 2)
5) (5/11)*x⁴ - (5/11)*x² = (5/11)*x² * (x² - 1) = (5/11)*x² * (x - 1)(x + 1)
6) 7y⁵ - (7/4)*y³ = 7y³ * (y² - 1/4) = 7y³ * (y - 1/2) * (y + 1/2)