Ответы и объяснения

2013-01-30T12:08:37+00:00

(x-1)(x-0,5)/(1-x)(1+x) - 3*(x-3)/(x+1)(x-3) = (0,5-x)/(1+x) - 3/(x+1) = (0,5-x-3)/(x+1) = (-2,5-x)/(x+1)