Question

dado o polinômio p(x)=-4x³+2x²+x-1, calcule :
a) p (1)
b )p (2)
c )p (-3)
d) p (0)

Answer 1

$P(x)=-4x^3+2x^2+x-1$

$a) P(1)=-4(1)^3+2(1)^2+1-1=-4+2=\boxed{-2}$

$b) P(2)=-4(2)^3+2(2)^2+2-1=-32+8+1=\boxed{-23}$

$c) P(-3)=-4(-3)^3+2(-3)^2+-3-1=-108+18-4=\boxed{-94}$

$d) P(0)=-4(0)^3+2(0)^2+0-1=\boxed{-1}$