Respostas

2013-10-03T17:24:21-03:00
P(0)= 2*(0)²-5*(0)²+0-3
P(0)=0-0+0-3
P(0) = -3

P(-1/2) = 2*(-1/2)²-5*(-1/2)²+(-1/2)-3
P(-1/2) = 2*1/4 - 5*1/4 - 1/2 - 3
P(-1/2) = 2/4 - 5/4 - 1/2 - 3
P(-1/2) = 2/4 - 5/4 - 2/4 - 12/4
P(-1/2) = -17/4