Question

P(x)=x+3,then p(x)+p(-x)=?

Answer 1

p(x) = x + 3
p(-x) = -x+3
⇒p(x) + p(-x) = (x + 3) + (-x + 3)
⇒p(x) +p(-x) = 6

Answer 2

IF

p(x)=x+3

thenp(-x)= -x+3

So,p(x)+p(-x)= (x+3) + (-x+3)

= 6