Given:
f(x) = 9x + 8
g(x) =3x - 3
(f.g)(x) = f(x) . g(x)
= (9x + 8 )(3x - 3)
Open the parenthesis.
= 9x(3x - 3) + 8(3x - 3)
= 27x² - 27x + 24x - 24
= 27x² - 3x - 24
Hence,
(f.g)(x) = = 27x² - 3x - 24
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