qterya15 qterya15

19-06-2018
Mathematics

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Let f(x) = -3x2 – 1 and g(x) = -5x. Find f(g(x)).

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sqdancefan sqdancefan

19-06-2018

Substitute g(x) where x is in the definition of f(x).
f(g(x)) = -3(g(x))^2 - 1
f(g(x)) = -3(-5x)^2 - 1
= -3(25x^2) - 1

f(g(x)) = -75x^2 - 1

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