P-1 1. Сократите дробь a) \(\frac{x}{x(a+3)}\) б) \(\frac{3(x+5)^2}{(x+5)^3}\) в) \(\frac{3a(b-2)}{6(b-2)^2}\) г) \(\frac{a^2-2a+1}{1-a^2}\)

a) \(\frac{x}{x(a+3)} = \frac{1}{a+3}\) б) \(\frac{3(x+5)^2}{(x+5)^3} = \frac{3}{x+5}\) в) \(\frac{3a(b-2)}{6(b-2)^2} = \frac{a}{2(b-2)}\) г) \(\frac{a^2-2a+1}{1-a^2} = \frac{(a-1)^2}{(1-a)(1+a)} = \frac{(a-1)^2}{-(a-1)(1+a)} = \frac{a-1}{-(1+a)} = \frac{1-a}{1+a}\)