сократите дробь : 3x^2-27/3x-x^2

(3x² - 27) / (3x - x²)  = 3(x² - 9) / x(3 - x) = 3 (x - 3) (x + 3) / x (3 - x) = = - 3(3 - x)(x+3) / x (3 - x) = 3 (x + 3) / x