Which of the following numbers is

Question

not in the domain of the function
(f)=x(x^2-16)/x^2-5x-6

4 a
B) 4
C) 0
D) 6
E) 1

Answer 1

Expand the function:
x(x+4)(x-4)/(x+1)(x-6)

Your roots are -4,0,4 Therefore,

All real numbers except -1 and 6 are not in the domain of the function.

Answer 2

all reals except -1 and 6 are in the domain.

The answers have some typos.