Question

find the domain of the function. f(x)=x-5/x^2-9

Answer 1

all real numbers except where the denominator would be equal to zero. so set
\[x^2-9=0\] and solve for x

Answer 2

you get
\[x=3,x=-3\] so your answer is "all real numbers except -3 and 3"

Answer 3

what do i do with x-5?

Answer 4

ignore it

Answer 5

a zero in the numerator is fine. that just gives 0

Answer 6

ok thankk you! :)