Question

Given that F(x) = x² + 2, evaluate F(1) + F(5).

Answer 1

to find f(1)
substitute x=1 in f(x).
that is
f(1)=(1)^2+2
to find f(5)
substitute x=5 in f(x)
that is
f(5)=(5)^2+2
Nw add them together to get f(1)+f(5)

Answer 2

F(x) = x² + 2
F(1) = (1)² + 2 = 1 + 2 = 3
F(5) = (5)² + 2 = 25 + 2 = 27

Answer 3

Hence F(1) + F(5) = 3 + 27 = 30