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Mathematics
Corky
24 January, 16:14
F (x) = 3x2 - 5x - 9
g (x) = 3x - 8
Find: f (g (x))
+2
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Lia Rubio
24 January, 19:12
0
27x^2 - 159x + 223
Step-by-step explanation:
We replace the x in f (x) by g (x):
f (g (x)) = 3 (3x - 8) ^2 - 5 (3x - 8) - 9
= 3 (9x^2 - 48x + 64) - 15x + 40 - 9
= 27x^2 - 144x + 192 - 15x + 31
= 27x^2 - 159x + 223.
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