Вправи 1001 - 1100 » 1081

1081. Скороти дріб. a) (x+5)/(x^2+ 7x+10) = (x+5)/((x+5)(x+2)) = 1/(x+2); б) (x-3)/(x^2- 2x-3) = (x-3)/((x-3)(x+3)) = 1/(x+1); в) (12+3x)/(x^2+ 5x+4) = (3(x+4))/((x+4)(x+1)) = 3/(x+1).