Question

помогите пожалуйста упростить

Answer 1

(x^2/x(x-3) + (9/x(3-x)) = (x^2/x(x-3) - (9/x(x-3)) = (x^2 - 3)/x(x-3) = (x-3)(x+3)/x (x-3) = (x+3)/x