Jawabanmu

2014-01-08T14:14:48+07:00
2(2x + 1) = x (x + 3)
4x + 2=x^2 + 3x
x^2 + 3x - 4x - 2 =0
x^2 - x - 2 =0
2014-01-08T15:19:11+07:00
2(2x + 1) = x (x + 3)
4x + 2=x^2 + 3x
x^2 -2 = 4x - 3x
x = x^2 - 2