Answer:
If p(x)=x+3,then
p(-x)=-x-3
p(x)+p(-x)=x+3-x-3=0
if p(×)=+3,then
p(-×)=-×-3
p(×)+p(-×)=×+3-×-3=0
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Verified answer
Answer:
If p(x)=x+3,then
p(-x)=-x-3
p(x)+p(-x)=x+3-x-3=0
if p(×)=+3,then
p(-×)=-×-3
p(×)+p(-×)=×+3-×-3=0