Respuesta :

Answer:

x+4/x-4

Step-by-step explanation:

x^2+7x+12/x^2-x-12

x^2+4x+3x+12/x^2+3x-4x-12

x * (x+4) +3(x+4)/ x* (x+3)-4(x+3)

(x+3)(x+4)/(x-4)(x+3)

x+4/x-4