Question

Dado lado polinômio P(x)=2x3+x2-4x+1 calcule o valor numérico para x=2 e para x=1

Answer 1

P(x) = $P(x) = 2x^3+x^2-4x+1\\P(2) =2(2)^3+(2)^2-4(2)+1\\\\P(2) = 2(8)+4-8+1\\P(2) = 16 -3\\P(2) = 13\\\\P(1) = 2x^3+x^2-4x+1\\P(1) =2(1)^3+(1)^2-4(1)+1\\\\P(1) = 2+1-8+1\\P(1) = -4\\P(1) = 13$