1) Сократите дробь: a) $$\frac{x^2+6x+5}{5x^2+6x+1}$$

$$\frac{x^2+6x+5}{5x^2+6x+1} = \frac{(x+1)(x+5)}{(5x+1)(x+1)} = \frac{x+5}{5x+1}$$