Respostas

  • Usuário do Brainly
2014-07-04T23:56:46-03:00
Q.R= (2x-1)(x+1)=
2x²+2x-x-1=
2x² +x -1
P +Q.R=
 x³-2x²+x+2x²+x-1=
x³+2x-1

R= letra A
1 5 1