Question 949267
divided by x+2 means that it is equal to 0 if x = -2 which means it can't be in the domain because then the value of R(x) is undefined because of a division by 0.


when x = -2, sqrt(x+1) is equal to -1 so x = -2 can't be in the domain because the answer would not be real.  You would get sqrt(-1) which is imaginary.