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Let f(x) = x + 9 and g(x) = x – 3. What is f(x) • g(x)
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You use FOIL: \[ \Large{(x+9) \cdot (x-3) = x^2 + 9x - 3x - 27 = \boxed {x^2 + 6x - 27}.} \]
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