Thanks so much :D
Edit: Fast help would be GREATLY appreciated!
If f(x) = 10....we have that
x^2 + 9 = 10 subtract 10 from both sides
x^2 -1 = 0 factor
(x + 1) (x - 1) = 0 set each factor to 0 and solve for x and we get that
x = 1 or x = -1
But only the second answer is in the domain
Also
3x - 8 = 10 subtract 10 from both sides
3x - 18 = 0 factor
3(x - 6) = 0 divide both sides by 3
x - 6 = 0 add 6 to both sides
x = 6 and this is in the domain
So....possible values of x are -1 and 6
Sorry, but that would make the sum 5 and 5 isn't right... Am I missing something?