Question

if p(x)=x+5
what is p(x)+p(-x)

Answer 1

x+5=0
x=-5
then, p(x) = p(-5)
p(-x) = p(-(-5)) = P(5)
p(x)+p(-x) = 5-5+5+5
p(x)+p(-x) = 10

Answer 2

if p(x)=x+5
then p(x)+p(-x)=
x+5-x+5
10