Ответ:
Решение:
- \( \frac{x-3}{6x^3} : \frac{x^2 - 6x + 9}{18x^4} = \frac{x-3}{6x^3} \cdot \frac{18x^4}{x^2 - 6x + 9} = \frac{x-3}{6x^3} \cdot \frac{18x^4}{(x-3)^2} = \frac{18x^4(x-3)}{6x^3(x-3)^2} = \frac{3x}{(x-3)} \)
- \( \frac{x^2 + 4x}{5x - 5} : \frac{7x + 28}{x - 1} = \frac{x(x+4)}{5(x-1)} : \frac{7(x+4)}{x-1} = \frac{x(x+4)}{5(x-1)} \cdot \frac{x-1}{7(x+4)} = \frac{x(x+4)(x-1)}{5(x-1)7(x+4)} = \frac{x}{35} \)
Ответ: 1) \(\frac{3x}{x-3}\); 2) \(\frac{x}{35}\).
