Вправи 1001 - 1100 » 1080

1080. Скороти дріб. a) (x^2- 2x-3)/(x+1) = ((x+1)(x-3))/((x+1)) = x – 3; б) (x-4)/(x^2- x-12) = (x-4)/((x-4)(x+3)) = 1/(x+3); в) (2x-10)/(x^2- 3x-10) = (2(x-5))/((x-5)(x+2)) = 2/(x+2).