We look for values of x that make the numerator zero be letting the numerator equal 0.
8x(x - 6) = 0
8x = 0 or x - 6 = 0
x = 0 or x = 6
The denominator excludes x = -2 and x = -9 from the domain, but since the zeros are not those values, the values excluded from the domain do not affect the zeros of the function.
