Вариант 2. Задание 1

1. a) $$rac{35a^6b^3}{21a^2b^4} = rac{5a^{6-2}}{3b^{4-3}} = rac{5a^4}{3b}$$
2. б) $$rac{15x^2}{6x + 15x^2} = rac{15x^2}{3x(2 + 5x)} = rac{5x}{2 + 5x}$$
3. в) $$rac{x^2 - 9}{x + 3} = rac{(x - 3)(x + 3)}{x + 3} = x - 3$$

Ответ:

• a) $$rac{5a^4}{3b}$$
• б) $$rac{5x}{2 + 5x}$$
• в) $$x - 3$$