SOLUTION: evaluate (f•g)(x) if f(x)=2x² and g(x)=3x-2 when x=-1

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Question 1158557: evaluate (f•g)(x) if f(x)=2x² and g(x)=3x-2 when x=-1
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

evaluate %28f%2Ag%29%28x%29 if f%28x%29=2x%5E2 and g%28x%29=3x-2 when x=-1
%28f%2Ag%29%28x%29=f%28x%29%2Ag%28x%29
%28f%2Ag%29%28x%29=2x%5E2%283x-2%29
%28f%2Ag%29%28x%29=6x%5E3-4x%5E2
when x=-1

%28f%2Ag%29%28-1%29=6%28-1%29%5E3-4%28-1%29%5E2
%28f%2Ag%29%28-1%29=6%28-1%29-4%281%29
%28f%2Ag%29%28-1%29=-6-4
%28f%2Ag%29%28-1%29=-10