f(x)=5-3x f(t)+f(-2)=eval and simplify

Question

f(X)=5-3x f(t)+(-2)=eval and simplefy

Answer 1

f(t) means to substitute t in for x in f(x).  f(-2) means to substitute -2 in for x in f(x)

 

f(t) = 5-3t

 

f(-2) = 5-3(-2) = 5+6 = 11

 

f(t) + f(-2) = (5-3t) + 11  = 5-3t+11 = 5+11-3t = 16 - 3t