Вариант 2. 1. Сократите дробь: a) $$\frac{35a^6b^3}{21a^2b^4}$$; б) $$\frac{15x^2}{6x + 15x^2}$$; в) $$\frac{x^2-9}{x+3}$$.

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