№1. Разложить на множители многочлен 1) 2a² - 26²; 2) сх² - су²; 3) 3x²-3; 4) 3ab²-27a; 5) x³-4x; 6) 2y³ -18y;

1) \[ 2a^2 - 2b^2 = 2(a^2 - b^2) = 2(a - b)(a + b). \]

2) \[ cx^2 - cy^2 = c(x^2 - y^2) = c(x - y)(x + y). \]

3) \[ 3x^2 - 3 = 3(x^2 - 1) = 3(x - 1)(x + 1). \]

4) \[ 3ab^2 - 27a = 3a(b^2 - 9) = 3a(b - 3)(b + 3). \]

5) \[ x^3 - 4x = x(x^2 - 4) = x(x - 2)(x + 2). \]

6) \[ 2y^3 - 18y = 2y(y^2 - 9) = 2y(y - 3)(y + 3). \]