Respostas

2013-06-20T21:18:40-03:00

4x²+4x+1=15x²-3x-5x+1

-11x²-4x=0

11x²+4x=0

x(11x+4)=0

x=0

11x+4=0

11x=4

x=4/11

 

S={0, 4/11}