Respostas

2013-08-30T16:20:45-03:00
 (2x+1)^{2}  =  (x+3)^{2} ............. logo: 4 x^{2} +4x + 1 =  x^{2} +6x+9
Entaão:
3 x^{2} -2x -8 = 0

x= (2 +ou- \sqrt{4+4.3.8} )/2.3
2 +ou-  \sqrt{100} /6 = 2+ou-10/6
x = 2 e x = 4/3
1 5 1