Answer:
x/x+1
Explanation:
x^2-2x-3/x^2+2x+1 / x-3/x
Factor the left side and flip the divisoin to multipcation
(x+1) (x-3) * x/x-3
(x+1) (x+1)
The items I bolded are the values that have been canceled, remember u can only cancel when they are multiplying/dividing never do it when adding/subtraction
you are left with : x/x+1