SOLUTION: For f(x) = x2 – 64 and g(x) = 2x + 3, what is the domain of f - g?

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Question 352529: For f(x) = x2 – 64 and g(x) = 2x + 3, what is the domain of f - g?
Answer by robertb(5830) About Me  (Show Source):
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f%28x%29=x%5E2+-+64 and g%28x%29+=+2x%2B3. The domain of both functions is the set of all real numbers. The intersection of the two domains is also the set of all real numbers, which incidentally, is also the th domain of f - g, f - g, and fg.