SOLUTION: Please help me! These are two separate problems. Let f(x)=x+4 and g(x)=x^2 -4. Find and simplify the expression. (f+g)(2) (f+g)(2=_________ (Simplify your answer.) Let f

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Please help me! These are two separate problems. Let f(x)=x+4 and g(x)=x^2 -4. Find and simplify the expression. (f+g)(2) (f+g)(2=_________ (Simplify your answer.) Let f      Log On


   

Question 419110: Please help me! These are two separate problems.
Let f(x)=x+4 and g(x)=x^2 -4.
Find and simplify the expression. (f+g)(2)
(f+g)(2=_________ (Simplify your answer.)
Let f(x)=x^2 -16 and g(x)=4-x.
Find (fg)(-3).
(fg)(-3)=____________
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

f(x)=x+4 and g(x)=x^2 -4

 (f+g)(x) = x+4 + x^2 - 4 = x^2 + x

 (f+g)(x) = x^2 + x

 (f+g)(2) = 2^2 + 2 = 6



f(x)=x^2 -16 and g(x)=4-x

 (f+g)(x) =  x^2 - 16 + 4- x 

(f+g)(x) = x^2 -x -12

(f+g)(-3) = (-3)^2 -(-3) -12 = 0