College Algebra

Question

h(x)=x+9

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x^2-9

Find all values of X that are NOT in the domain of h

Answer 1

x^2-9 = 0

(x+3)(x-3)=0

x = +or-3 shall make the denominator ZER0

so neither 3 nor -3 are in the domain

The domain is (-infinity,-3) U (-3,3) U (3,infinity)