Thanks so much :D

Edit: Fast help would be GREATLY appreciated!

AnonymousConfusedGuy
Dec 20, 2017

#1**+1 **

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

CPhill
Dec 20, 2017

#2**+2 **

Sorry, but that would make the sum 5 and 5 isn't right... Am I missing something?

AnonymousConfusedGuy
Dec 20, 2017