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27-01-2020
Mathematics

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F(x)=-5x
G(x)=8x^2-5x-9
Find (f•g)(x)
A.-40x^4+25x^3+45x^2
B.-40x^3-5x-9
C.-40x^2+25x+45x
D.-40x^3+25^2+45x

Fx5x Gx8x25x9 Find fgx A40x425x345x2 B40x35x9 C40x225x45x D40x325245x class=

Respuesta :

27-01-2020

Answer:

D

Step-by-step explanation:

(f×g)(x)=-5x(8x^2-5x-9)=-5x(8x^2)-5x(-5x)-5x (-9)=-40x^3+25x^2+45x

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