Question

Dado ao polinômio P(x) 4x¹- 2x²-x-1.
calcule
a) P(-2)
b) P(3)

Answer 1

P(x)=4x¹-2x²-x-1
a) P(-2)=4.(-2)¹-2.(-2)²-(-2)-1
P(-2)=4.(-2)-2.4+2-1
P(-2)=-8-8+1
P(-2)=-16+1
P(-2)=-15
b) P(3)=4.3¹-2.3²-3-1
P(3)=4.3-2.9-4
P(3)=12-18-4
P(3)=12-22
P(3)=-10

Answer 2

a)4(-2) - 2(-2)² - (-2) - 1
-8 -8 +2 - 1= -13

b) 4 (3) - 2 (3)² - 3 - 1
12-18 - 3 - 1 = -10