Algebra functions

Question

f(x)=x²+1

g(x)=2x²+3

 

Evaluate the following expression involving the functions above:

 

(f-g)(0)

Answer 1

f(x)=x²+1
g(x)=2x²+3

 

(f-g)(0)=f(0)-g(0) = 0² + 1 -(2(0)² + 3)=1-3=-2