Question

What is f(x) − f(x + 2) if f(x + 1) = x(x + 2)?

Answer 1

f(x)=x+2/x+1 write answer

Answer 2

given f(x+1)= x(x+2)= x^2+2x
then
replace x by x+1
f(x+2)=(x+1)^2+ 2×(x+1)
F(x+2)= x^2+4x+3
similarly replace x by x-1
and find value as same