Suppose f(x)=3+x^2 Calculate the following values:

Question

A)  f(x+1)=

B) f(x)+f(−5)

Answer 1

A f(x+1) = 3 + (x+1)^2 = 3 + x^2 +2x + 1

= x^2 + 2x + 4

B f(x) + f(-5) = 3+x^2 + 3 + (-5)^2 = 6 + 25 + x^2

= x^2 + 31