SOLUTION: I need help solving this please. Thanks. Find (f-g) and (f+g)(3) for f(x)=2x^2+x+5 and g(x)=-4-4x+x^2

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Question 1013725: I need help solving this please. Thanks.
Find (f-g) and (f+g)(3) for f(x)=2x^2+x+5 and g(x)=-4-4x+x^2
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
(f-g)(x)=2x^2+x+5-x^2+4x+4 (change signs because subtracting)
=x^2+5x+9
if one wants (3) substituted for x, it is 9+15+9=33.
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(f+g)(x)=3x^2-3x+1
and when x=3, 27-9+1=19.