SOLUTION: f(x)= x^2+2x-3 and g(x)=5+x find (fg)(x)

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Question 54807This question is from textbook intro to functions
: f(x)= x^2+2x-3 and g(x)=5+x find (fg)(x) This question is from textbook intro to functions

Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)= x^2+2x-3 and g(x)=5+x find (fg)(x)
(fg)(x) means you multiply the f function times the g function.
%28fg%29%28x%29=%28x%5E2%2B2x-3%29%285%2Bx%29
=x%5E2%285%2Bx%29%2B2x%285%2Bx%29-3%285%2Bx%29
=5x%5E2%2Bx%5E3%2B10x%2B2x%5E2-15-3x
=x%5E3%2B5x%5E2%2B2x%5E2%2B10x-3x-15
highlight%28%28fg%29%28x%29=x%5E3%2B7x%5E2%2B7x-15%29
Happy Calculating!!!