Question 285958
You need to either divide (x-2) or (x+4) into x^2+2x-8
 or factor x^2+2x-8
we are looking for factors of -8 which add up +2 
4 -2 fit the bill

(x+4)/(x^2+2x-8)=(x+4)/(x+4)(x-2)=1/(x-2)