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F(x)=9x^2-5x, g(x)=19x-4 (fog)(9)
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3 votes
F(x)=9x^2-5x, g(x)=19x-4
(fog)(9)

User Jason Hoffmann
by
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2 Answers

7 votes
f(x) = 9x² - 5x
g(x) = 19x - 4

(f о g)(9) = 9[19(9) - 4]² - 5[19(9) - 4]
(f ο g)(9) = 9(171 - 4)² - 5(174 - 4)
(f ο g)(9) = 9(167)² - 5(167)
(f ο g)(9) = 9(27889) - 865
(f ο g)(9) = 251001 - 865
(f ο g)(9) = 250136
User Timbonicus
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5.8k points
4 votes
is it (fog)(9) or (fog)(x) ?
User Chris Charles
by
6.1k points
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