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Given f(x) = 3x + 5 and g(x) = x^2 - x + 7,

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which of the following is an expression for f(g(x))?

asked Nov 12, 2014 in ALGEBRA 1 by anonymous

1 Answer

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The function is f(x) = 3x + 5 and g(x) = x² - x + 7 .

f(g(x)) = f (x² - x + 7)

          = 3 (x² - x + 7) + 5

         = 3x² - 3x + 21 +5

        = 3x² - 3x + 26

So f(g(x)) = 3x² - 3x + 26 .

answered Nov 12, 2014 by yamin_math Mentor

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