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Mathematics 13 Online
OpenStudy (anonymous):

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

OpenStudy (angela210793):

do it same as i did the other one

OpenStudy (rulnick):

(5x+4)(4-x) By FOIL, = 5x(4) + (5x)(-x) + 4(4) + 4(-x) Need more help than that?

OpenStudy (rulnick):

= 20x - 5x^2 + 16 - 4x = -5x^2 + 16x + 16

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