1) 2x^2(x - 3y) = 2x^2 * x - 2x^2 * 3y = 2x^3 - 6x^2y;
б) (2x - 3y)(3y + 2x) = (2x - 3y)(2x + 3y) = 4x^2 - 9y^2;
в) (а + b)(a - b)(a + b) = (a^2 - b^2)(a + b) = a^3 + a^2b - ab^2 - b^3.
1) 2x^2(x - 3y) = 2x^2 * x - 2x^2 * 3y = 2x^3 - 6x^2y;
б) (2x - 3y)(3y + 2x) = (2x - 3y)(2x + 3y) = 4x^2 - 9y^2;
в) (а + b)(a - b)(a + b) = (a^2 - b^2)(a + b) = a^3 + a^2b - ab^2 - b^3.