f(x) = x-7, g(x) = x2-5, and h(x) =4-2x
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"i have to evaluate (g - f)(x)"
That notation simply means that you subtract the f(x) expression from the one for g(x)
(x^2 - 5) - (x - 7) = x^2 - x + 2
What are we supposed to do with h(x)?
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