Question

√x^2-2x-15

what is the domain of that function

Answer 1

what's the number inside the square root? only the x^2 ?

Answer 2

or is everything inside the square root?

Answer 3

the whole thing

Answer 4

Anyway, the domain of a square root must be: everything inside must be greater or equal to 0.
You just need to solve that inequation

Answer 5

(x^2-2x-15) >= 0

Answer 6

the solution is x >= 5 or x <=-3

so your domain is: ]-oo , -3] U [5 , +oo[

Answer 7

okay thats what i got thanks a lot

Answer 8

np. Make this an answered question please :)