Question

помогите решить, срочно.
ДАМ 50 БАЛЛОВ

Answer 1

1) 5a² - 20 = 5(a² - 4) = 5(a - 2)(a + 2)
2) 12b² - 12c² = 12(b² - c²) = 12(b - c)(b + c)
3) 18x² + 12x + 2 = 18(x + 1/3)² = 2(3x + 1)²
4) (x - 2)² - 81 = (x - 2)² - 9² = (x - 2 + 9)(x - 2 - 9) = (x + 7)(x - 11)
5) ax + bx + 5a + 5b = x(a + b) + 5(a + b) = (x + 5)(a + b)
6) x(a + 3) - y(a + 3) = (x - y)(a + 3)
7) 3ab² - 3ac² = 3a(b² - c²) = 3a(b - c)(b + c)
8) 27y³ - 0,064 = (3y)³ - 0,4³ = (3y - 0,4)(9y² + 1,2y + 0,16)