ali48
ali48
16-07-2017
Mathematics
contestada
F(x) =x^2+6x and g(x)=7-x find (f-g)(x) and (f-g)(9)
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Banabanana
Banabanana
16-07-2017
(f-g)(x) = x²+6x - (7-x)
(f-g)(x) = x² + 6x - 7 + x
(f-g)(x) = x² + 7x - 7
(f-g)(9) = 9² + 7*9 - 7
(f-g)(9) = 81 + 63 - 7
(f-g)(9) = 137
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