Question

Seja P(x) = 2x3+ 3x2 – 8x + 3, o valor numérico de P(1) + P(–1) é:

Answer 1

$2(1)^3+3(1)^2-8(1)+3 \\ 2+3-8+3 \\ 0 \\ \\ 2(-1)^3+3(-1)^2-8(-1)+3 \\ -2+3+8+3 \\ 12$

P(1)=0
P(-1)=12

0+12=12