If p(x) =x+4, then p(x) +p(-x) =?Explain with solution

1.	If p(x) =x+4, then p(x) +p(-x) =?Explain with solution
Answer» P(x)=x+4P(-x) =-x+4P(x)+ p(-x) =x+4+(-x+4)=8

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