MCQ
If $p(x) = x + 4$ then $p(x) + p(-x) = ?$
- A$0$
- B$4$
- C$2x$
- ✓$8$
✓
Answer
Correct option: D.
$8$
$p(x) = x + 4$
$p(-x) = -x + 4$
$p(x) + p(-x) = (x + 4) + (-x + 4)$
$= x + 4 - x + 4$
$= 8$
$p(-x) = -x + 4$
$p(x) + p(-x) = (x + 4) + (-x + 4)$
$= x + 4 - x + 4$
$= 8$
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