Respostas

2014-08-31T11:13:32-03:00
5x²+11x+2
D=11²-4*5*2
D=121-40
D=81
x'=-11+9/2*5=-0,2
x"=-11-9/2*5=-2

R: {X E R / -2<x ou x>-0,2}