SOLUTION: Please help me with this. f(x)=x^2-2, then f(x+2)-f(x)=??

SOLUTION: Please help me with this. f(x)=x^2-2, then f(x+2)-f(x)=??

Algebra.Com

Question 95091: Please help me with this.

f(x)=x^2-2, then f(x+2)-f(x)=??
Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
if f(x)=x^2-2,
then
f(x+2)=(x+2)^2-2
.
putting it all together
f(x+2)-f(x)= (x-2)^2-2-(x^2-2) [multiply]

[combine like-terms]
4x+4

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