Question

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

Answer 1

P(1) = 2(1)³ + 3(1)² -8(1) + 3
P(1) = 2 + 3 -8 + 3
P(1)= 0

P(-1) = 2(-1)³ + 3(-1)² -8(-1) +3
P(-1) = -2 + 3 + 8 + 3
P(-1) = 12
Então P(1) + P(-1) = 0 + 12 = 12