Question

If P (x) = 2x³ + 3x² + 5x - 7, then
find the value of P (x) + P (-x).​

Answer 1

Answer:

Step-by-step explanation:

Replace (x) with (-x)

2x^3+3x^2+5x-7 becomes 2(-x)^3+3(-x)^2+5(-x)-7

so p(-x)= -2x^3+3x-5x-7

now add it to p(x)

(2x^3+3x^2+5x-7)+(-2x^3+3x^2-5x-7)

p(x)+p(-x)= 6x^2-14