Question

Me ajude pfv, pra amanhã!!!!

Answer 1

Bom dia!

Calculando:
$P(x)\equiv x^4+3x^2-x+2\\P(i)\equiv i^4+3i^2-i+2\\P(i)\equiv 1-3-i+2\\P(i)\equiv -2-i+2\\\boxed{P(i)\equiv -i}$

Espero ter ajudado!