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Mathematics 21 Online
OpenStudy (anonymous):

Let f(x) = 5x + 4 and g(x) = 4 - x. Find f(x) . g(x)

OpenStudy (itsonlycdeee):

(5x+4)(4-x) ---> 20x - 5x^2 + 16 - 4x ---> -5x^2 +16x + 16

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