Answer :

Answer:

f + g=9x^2 +x-9

The domain is all real values

Step-by-step explanation:

f(x) = x - 9

g(x) = 9 x^2

f + g=x-9+9x^2

      = 9x^2 +x-9

The domain is the values that x can take

The domain is all real values

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