Respostas

2014-02-24T22:47:08-03:00
2.(-1/2)² - (-1/2)+3
2.1/4+1/2+3
2/4+1/2+3 (faz o MMC)
2+2+12/4
16/4 = 4 Resposta=4
2014-02-24T22:59:21-03:00
Olá

2x²-x+3  para x=-1/2

 2.(-1/2)² +1/2+3=
  2.1/4-1/2+3=
   1/2+1/2+3= 4